Data / Nonprofits / Colorado / Animal-related
Animal-related nonprofits in Colorado: 978 registered with the IRS
978 animal-related nonprofits are registered with the IRS in Colorado, 942 of them 501(c)(3) charities; the 385 that report revenue took in $493.5 million. The most are in Denver (85), Colorado SPGS (58), Fort Collins (38). The largest by revenue: Denver Dumb Friends League ($92.9 million), Denver Zoological Foundation Inc ($66 million), The Wild Animal Sanctuary A Colorado Non-Profit Corporation ($38.3 million).
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The 500 largest by revenue
| Organization | City | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Denver Dumb Friends League | Denver | 501(c)(3) | 1942 | $92.9 million | $180.3 million | 2025-06 |
| Denver Zoological Foundation Inc | Denver | 501(c)(3) | 1952 | $66 million | $26.3 million | 2025-12 |
| The Wild Animal Sanctuary A Colorado Non-Profit Corporation | Keenesburg | 501(c)(3) | 1999 | $38.3 million | $60.2 million | 2025-12 |
| Cheyenne Mountain Zoological Society | Colorado SPGS | 501(c)(3) | 1939 | $34.4 million | $145.8 million | 2026-04 |
| Humane Society of the Pikes Peak Region | Colorado SPGS | 501(c)(3) | 1951 | $21.5 million | $30.2 million | 2024-12 |
| Morris Animal Foundation | Denver | 501(c)(3) | 1956 | $17.3 million | $123.3 million | 2025-06 |
| Noco Humane | Loveland | 501(c)(3) | 1971 | $13.5 million | $34.2 million | 2026-06 |
| True Companions Inc | Denver | 501(c)(3) | 1990 | $11.3 million | $15 million | 2025-12 |
| Rocky Mountain Bird Observatory | Brighton | 501(c)(3) | 1988 | $11.1 million | $7.7 million | 2025-12 |
| The Humane Society of Boulder Valley Inc | Boulder | 501(c)(3) | 1933 | $8.5 million | $20.1 million | 2025-12 |
| Rocky Mountain Butterfly Consortium | Westminster | 501(c)(3) | 1991 | $8.3 million | $10.4 million | 2025-12 |
| Environment for the Americas Inc | Boulder | 501(c)(3) | 2008 | $7 million | $944,158 | 2024-12 |
| Animal Friends Alliance | Fort Collins | 501(c)(3) | 2007 | $5.7 million | $6.9 million | 2025-12 |
| Longmont Humane Society Inc | Longmont | 501(c)(3) | 1974 | $5.3 million | $7.5 million | 2024-12 |
| Native American Fish & Wildlife Society | Northglenn | 501(c)(3) | 1989 | $4.7 million | $9.9 million | 2025-12 |
| Colorado Pet Pantry | Boulder | 501(c)(3) | 2012 | $4.2 million | $1.8 million | 2025-12 |
| Colorado Horse Rescue | Longmont | 501(c)(3) | 1989 | $3.6 million | $7.1 million | 2025-06 |
| Wildlife Protection Solutions | Golden | 501(c)(3) | 2013 | $3.3 million | $19.4 million | 2024-12 |
| Cat Care Society | Lakewood | 501(c)(3) | 1982 | $3.3 million | $4.7 million | 2025-06 |
| La Plata County Humane Society | Durango | 501(c)(3) | 1973 | $3.2 million | $4.3 million | 2024-12 |
| Dogs Playing for Life | Longmont | 501(c)(3) | 2015 | $3 million | $1 million | 2025-12 |
| Pueblo Zoological Society | Pueblo | 501(c)(3) | 1978 | $2.9 million | $5 million | 2025-12 |
| Colorado Zoological Trust Inc | Denver | 501(c)(3) | 1999 | $2.9 million | $38.1 million | 2025-12 |
| Planned Pethood International | Conifer | 501(c)(3) | 2000 | $2.5 million | $3.4 million | 2025-12 |
| Colorado Wolf and Wildlife Center | Divide | 501(c)(3) | 1998 | $2.4 million | $9.9 million | 2024-12 |
| Friends of Foothills Animal Shelter | Golden | 501(c)(3) | 2014 | $2.1 million | $103,696 | 2024-12 |
| American Birding Association Inc | Colorado SPGS | 501(c)(3) | 1986 | $2.1 million | $794,215 | 2025-12 |
| Second Chance Humane Society Inc | Ridgway | 501(c)(3) | 1995 | $2.1 million | $2.6 million | 2025-12 |
| Golden Retriever Rescue of the Rockies | Arvada | 501(c)(3) | 1998 | $2 million | $6.3 million | 2025-12 |
| Soul Dog Rescue | Fort Lupton | 501(c)(3) | 2012 | $1.9 million | $1 million | 2024-12 |
| Pet Sustainability Coalition | Boulder | 501(c)(3) | 2020 | $1.8 million | $351,930 | 2025-12 |
| Humane Society of the South Platte Valley Inc | Littleton | 501(c)(3) | 2009 | $1.8 million | $1.9 million | 2025-12 |
| Ark-Valley Humane Society Inc | Buena Vista | 501(c)(3) | 1993 | $1.7 million | $3 million | 2025-12 |
| Greenwood Wildlife Rehabilitation Center | Boulder | 501(c)(3) | 1993 | $1.7 million | $2.7 million | 2024-12 |
| Hamlett Spay and Neuter Clinic of Colorado Springs | Colorado SPGS | 501(c)(3) | 1977 | $1.7 million | $1.1 million | 2025-06 |
| South Platte Water Related Activities Program Inc | Sterling | 501(c)(3) | 2006 | $1.7 million | $6.8 million | 2024-12 |
| Street Dog Coalition | Fort Collins | 501(c)(3) | 2016 | $1.5 million | $946,670 | 2025-12 |
| Longhopes Donkey Shelter Inc | Bennett | 501(c)(3) | 2000 | $1.5 million | $4.9 million | 2025-12 |
| Roice-Hurst Humane Society Inc | Grand JCT | 501(c)(3) | 1967 | $1.5 million | $3.8 million | 2025-06 |
| Luvin Arms | Erie | 501(c)(3) | 2015 | $1.5 million | $3.8 million | 2024-12 |
| Trout Unlimited | Denver | 501(c)(3) | 1972 | $1.4 million | $1.6 million | 2025-03 |
| Spaytoday | Lakewood | 501(c)(3) | 2009 | $1.4 million | $822,776 | 2024-12 |
| Animal Welfare and Protection Society | Pueblo | 501(c)(3) | 1987 | $1.3 million | $3.9 million | 2025-03 |
| Peppers Senior Dog Sanctuary | Littleton | 501(c)(3) | 2020 | $1.3 million | $1.7 million | 2025-12 |
| Humane Society of Pagosa Springs Inc | Pagosa SPGS | 501(c)(3) | 1987 | $1.3 million | $2.3 million | 2025-12 |
| Big Bones Canine Rescue Service | Windsor | 501(c)(3) | 2014 | $1.2 million | $157,012 | 2025-12 |
| Evergreen Animal Protective League | Evergreen | 501(c)(3) | 1981 | $1.2 million | $2.7 million | 2025-12 |
| Lifeline Pet Rescue | Brighton | 501(c)(3) | 2024 | $1.2 million | $538,914 | 2023-12 |
| Rocky Mountain Puppy Rescue | Berthoud | 501(c)(3) | 2010 | $1.2 million | $494,572 | 2025-12 |
| Amici Cannis USA | Fort Collins | 501(c)(3) | 2016 | $1.2 million | $927,623 | 2025-12 |
| Partners in Animal Protection and Conservation | Golden | 501(c)(3) | 2018 | $1.1 million | $0 | 2024-12 |
| Journey Home Animal Center Inc | Rifle | 501(c)(3) | 2000 | $1.1 million | $2.7 million | 2025-12 |
| Pet Care Coalition Inc | Aurora | 501(c)(3) | 2020 | $1.1 million | $111,611 | 2024-12 |
| Coloradans for Responsible Wildlife Management | Canon City | 501(c)(4) | 2017 | $1.1 million | $369,395 | 2024-12 |
| Mountain Valley Horse Rescue | MC Coy | 501(c)(3) | 2005 | $1.1 million | $4 million | 2024-12 |
| Colorado Animal Rescue Inc A Nonprofit Corporation | Glenwood SPGS | 501(c)(3) | 1993 | $1.1 million | $2 million | 2024-12 |
| Ho-Bo Care Boxer Rescue | Colorado SPGS | 501(c)(3) | 2002 | $1.1 million | $897,811 | 2025-12 |
| Colorado Reined Cow Horse Association Inc | Delta | 501(c)(5) | 2025 | $1.1 million | $103,395 | 2024-12 |
| Rezdawg Rescue Inc | Lafayette | 501(c)(3) | 2013 | $1.1 million | $762,700 | 2024-12 |
| Arabian Breeders Sweepstakes | Greenwood VLG | 501(c)(5) | 2012 | $1 million | $9.2 million | 2025-03 |
| Fleet of Angels Inc | Lakewood | 501(c)(3) | 2018 | $990,691 | $704,699 | 2025-12 |
| Colorado Horse Rescue Network | Rush | 501(c)(3) | 2014 | $970,797 | $520,511 | 2025-09 |
| Katie Adamson Conservation Fund | Littleton | 501(c)(3) | 2015 | $912,198 | $66,531 | 2025-12 |
| 4 Paws 4 Life Rescue | Sedalia | 501(c)(3) | 2012 | $898,702 | $2.5 million | 2024-12 |
| Blue River Horse Center Inc | Silverthorne | 501(c)(3) | 2015 | $888,750 | $1 million | 2025-12 |
| Humane Society of Fremont County Inc | Canon City | 501(c)(3) | 1952 | $866,657 | $769,144 | 2025-12 |
| Golden Retriever Club of America | Littleton | 501(c)(4) | 1973 | $831,424 | $584,627 | 2025-07 |
| Gabriel Foundation | Elizabeth | 501(c)(3) | 1999 | $814,483 | $1.1 million | 2024-12 |
| Dogsters Spay & Neuter Program | Durango | 501(c)(3) | 2005 | $769,212 | $933,718 | 2025-12 |
| Rocky Mountain Feline Rescue Inc | Denver | 501(c)(3) | 1982 | $767,458 | $457,403 | 2025-12 |
| Pandas International | Littleton | 501(c)(3) | 2000 | $752,078 | $754,832 | 2024-12 |
| Almost Home Adoptions | Westminster | 501(c)(3) | 2005 | $747,936 | $1.1 million | 2024-12 |
| Teller County Regional Animal Shelter Inc | Divide | 501(c)(3) | 2002 | $737,268 | $638,170 | 2024-12 |
| Mission Wolf | Westcliffe | 501(c)(3) | 1989 | $735,324 | $3.8 million | 2024-12 |
| The Feline Fix | Commerce City | 501(c)(3) | 2009 | $727,516 | $281,261 | 2025-12 |
| Lightshine Canine Inc | Longmont | 501(c)(3) | 2021 | $694,240 | $62,762 | 2024-12 |
| W O L F | Laporte | 501(c)(3) | 1995 | $684,695 | $2.7 million | 2024-12 |
| Caravita Foundation | Greenwood VLG | 501(c)(3) | 2024 | $681,911 | $195,330 | 2025-12 |
| Animal Rescue of the Rockies | Aurora | 501(c)(3) | 2005 | $673,144 | $584,368 | 2025-12 |
| Denkai Animal Sanctuary | Hesperus | 501(c)(3) | 2005 | $666,400 | $2.4 million | 2025-12 |
| Southern Colorado Spay & Neuter Association | Pueblo | 501(c)(3) | 1996 | $665,327 | $602,786 | 2024-12 |
| Colorado Puppy Rescue of Colorado | Parker | 501(c)(3) | 2006 | $641,625 | $188,254 | 2025-12 |
| Africa Network for Animal Welfare- USA | Denver | 501(c)(3) | 2008 | $630,520 | $308,604 | 2024-12 |
| Demis Animal Rescue Inc | Aurora | 501(c)(3) | 2013 | $610,756 | $154,975 | 2025-12 |
| Happy Cats Haven Inc | Manitou SPGS | 501(c)(3) | 2011 | $580,041 | $486,095 | 2024-12 |
| Lolas Rescue | Littleton | 501(c)(3) | 2013 | $576,349 | $61,469 | 2024-12 |
| Wildfire Research Center | Niwot | 501(c)(3) | 2019 | $547,128 | $111,834 | 2024-12 |
| Mile High Labrador Retriever Mission | Broomfield | 501(c)(3) | 2014 | $546,432 | $700,892 | 2025-12 |
| Safe Harbor Lab Rescue | Golden | 501(c)(3) | 2003 | $534,839 | $2.2 million | 2025-12 |
| Grand County Pet Pals | Granby | 501(c)(3) | 1994 | $531,212 | $1.2 million | 2024-12 |
| Broken Shovels Farm and Sanctuary School | Henderson | 501(c)(3) | 2018 | $530,603 | $749,368 | 2024-12 |
| Wild Blue Cats | Colorado SPGS | 501(c)(3) | 2010 | $518,557 | $545,300 | 2025-12 |
| Mile High Canine Rescue Inc | Castle Rock | 501(c)(3) | 2019 | $508,428 | $236,271 | 2024-12 |
| Bergen Spay and Neuter Alliance | Denver | 501(c)(3) | 2019 | $504,375 | $449,678 | 2025-12 |
| Action for A Wild Earth | Denver | 501(c)(3) | 2024 | $501,159 | $429,460 | 2024-12 |
| Park County Livesetock Committee Inc | Bailey | 501(c)(3) | 2010 | $484,088 | $36,888 | 2025-12 |
| All Aboard Animal Rescue and Shelter Inc | Fort Collins | 501(c)(3) | 2013 | $474,913 | $196,096 | 2025-12 |
| Pro-Animal Future | Boulder | 501(c)(4) | 2024 | $468,366 | $211,550 | 2024-12 |
| Elite Equine Rescue | Colorado SPGS | 501(c)(3) | 2018 | $455,416 | $120,181 | 2025-12 |
| Colorado Animal Rescue Express | Englewood | 501(c)(3) | 2007 | $436,904 | $604,978 | 2025-12 |
| Open Sanctuary Project Inc | Niwot | 501(c)(3) | 2018 | $418,592 | $234,624 | 2024-12 |
| JJS Helping Paws Inc | Canon City | 501(c)(3) | 2014 | $417,445 | $470,188 | 2025-12 |
| Cat Care Durango | Durango | 501(c)(3) | 2023 | $407,795 | $67,463 | 2025-12 |
| Fins & Feathers Inc | Colorado SPGS | 501(c)(3) | 2022 | $407,467 | $35,093 | 2024-12 |
| Friends of the Aspen Animal Shelter | Aspen | 501(c)(3) | 2001 | $398,419 | $1.6 million | 2024-12 |
| Golden Retriever Freedom Rescue Inc | Denver | 501(c)(3) | 2003 | $391,736 | $430,642 | 2024-12 |
| Colorado Springs All Breed Rescue | Colorado SPGS | 501(c)(3) | 1996 | $390,375 | $22,550 | 2024-12 |
| Northern Colorado Wildlife Center | Fort Collins | 501(c)(3) | 2016 | $380,828 | $541,000 | 2024-12 |
| Parkers Animal Rescue | Durango | 501(c)(3) | 2015 | $379,441 | $1.1 million | 2025-12 |
| Project Animalaid | Boulder | 501(c)(3) | 2009 | $379,185 | $640,591 | 2024-12 |
| A Friend of Jack Rescue | Denver | 501(c)(3) | 2020 | $375,848 | $42,280 | 2024-12 |
| Natures Educators | Florence | 501(c)(3) | 2011 | $355,788 | $237,083 | 2025-12 |
| Rocky Mountain Wildlife Alliance Inc | Sedalia | 501(c)(3) | 2017 | $352,505 | $197,346 | 2025-12 |
| 2 Blondes All Breed Rescue Inc | Lakewood | 501(c)(3) | 2015 | $351,865 | $64,909 | 2025-12 |
| El Paso County Canine Rescue | Elbert | 501(c)(3) | 2019 | $348,323 | $14,665 | 2025-12 |
| Surface Creek Animal Shelter | Cedaredge | 501(c)(3) | 2003 | $344,823 | $455,260 | 2025-12 |
| Two Mile High Club | Cripple Creek | 501(c)(3) | 2020 | $343,683 | $371,644 | 2025-12 |
| Denver Dachshunds Rescue and Transport | Calhan | 501(c)(3) | 2017 | $340,706 | $288,042 | 2025-12 |
| Angels With Paws | Lakewood | 501(c)(3) | 2004 | $340,244 | $829,716 | 2025-12 |
| Pawsco | Denver | 501(c)(3) | 2004 | $337,897 | $339,846 | 2025-12 |
| The Cloud Foundation | Colorado SPGS | 501(c)(3) | 2005 | $336,342 | $546,515 | 2024-12 |
| For the Love of Aria | Kiowa | 501(c)(3) | 2019 | $327,407 | $19,813 | 2025-12 |
| Colorado Kitty Coalition | Loveland | 501(c)(3) | 2025 | $327,287 | $58,522 | 2025-12 |
| Big Dogs Huge Paws Inc | Larkspur | 501(c)(3) | 2011 | $324,506 | $65,605 | 2025-06 |
| Warrior Mission Ranch Inc | Peyton | 501(c)(3) | 2023 | $324,283 | $220,177 | 2025-12 |
| Pet Assistance League Store | Trinidad | 501(c)(3) | 2023 | $322,134 | $283,884 | 2024-12 |
| Pawsitive Restorations Animal Rescue | Aurora | 501(c)(3) | 2020 | $317,467 | $379,632 | 2025-12 |
| Terolyn Horse Rescue Inc | Elizabeth | 501(c)(3) | 2016 | $308,735 | $350,785 | 2025-12 |
| Logan County Humane Society | Sterling | 501(c)(3) | 2004 | $307,478 | $830,065 | 2024-12 |
| Zumas Rescue Ranch Inc | Littleton | 501(c)(3) | 2008 | $302,925 | $370,865 | 2025-12 |
| Grand Rivers Humane Society | Grand Junction | 501(c)(3) | 2005 | $298,598 | $149,229 | 2025-12 |
| Colorado Wildlife Heritage Foundation Inc | Centennial | 501(c)(3) | 1989 | $289,000 | $1.5 million | 2024-12 |
| Summit Lost Pet Rescue Inc | Silverthorne | 501(c)(3) | 2020 | $287,978 | $287,382 | 2025-12 |
| Bounce Animal Rescue | Fort Collins | 501(c)(3) | 2015 | $286,088 | $27,507 | 2025-12 |
| Old Mutt Hut | Colorado SPGS | 501(c)(3) | 2017 | $277,393 | $660,486 | 2025-12 |
| Meeker Mustang Makeover | Meeker | 501(c)(3) | 2022 | $273,028 | $93,640 | 2025-12 |
| Cats League and Assistance of the Western Slope | Loma | 501(c)(3) | 2007 | $271,836 | $759,257 | 2025-12 |
| Harmony Animal Matchmaker and Sanctuary | Grand JCT | 501(c)(3) | 2025 | $267,833 | $4,667 | 2024-12 |
| Breeder Release Adoption Service | Boncarbo | 501(c)(3) | 2010 | $253,032 | $747,901 | 2025-12 |
| Pauline S Schneegas Wildlife Foundation | Silt | 501(c)(3) | 1992 | $251,272 | $495,582 | 2025-12 |
| Berchert Ranch Animal Rescue Inc | Buena Vista | 501(c)(3) | 2013 | $250,789 | $8,930 | 2025-12 |
| Meeker Classic Sheepdog Championship Inc | Meeker | 501(c)(3) | 2019 | $248,854 | $233,444 | 2025-12 |
| Mountain Pet Rescue | Tabernash | 501(c)(3) | 2012 | $246,706 | $72,277 | 2024-12 |
| Far View Horse Rescue | Breckenridge | 501(c)(3) | 2011 | $245,525 | $604,875 | 2024-12 |
| Blue Rose Ranch Inc | Springfield | 501(c)(3) | 2006 | $241,644 | $211,347 | 2025-12 |
| Rocky Mountain Cocker Rescue | Parker | 501(c)(3) | 2009 | $236,845 | $139,041 | 2024-12 |
| Trevors Animal Rescue | Parker | 501(c)(3) | 2021 | $236,600 | $52,754 | 2024-12 |
| Saving the Survivors | Basalt | 501(c)(3) | 2019 | $236,463 | $131,668 | 2025-12 |
| K9 Hurricanes Heroes | Colorado SPGS | 501(c)(3) | 2019 | $236,281 | $71,513 | 2025-12 |
| Friends of Douglas County K-9 | Franktown | 501(c)(3) | 2011 | $233,475 | $465,933 | 2025-12 |
| Colorado Federation of Animal Welfare Agencies | Denver | 501(c)(3) | 2002 | $233,398 | $481,398 | 2025-12 |
| Colorado Crane Conservation Coalition Inc | Hayden | 501(c)(3) | 2013 | $232,618 | $434,247 | 2025-12 |
| End of the Trail Rescue | Olathe | 501(c)(3) | 2016 | $232,360 | $169,938 | 2025-12 |
| Isla Animals | Boulder | 501(c)(3) | 2010 | $230,078 | $312,216 | 2024-12 |
| Horse Protection League | Arvada | 501(c)(3) | 1994 | $228,797 | $227,981 | 2025-12 |
| Lasso | Pagosa SPGS | 501(c)(3) | 2002 | $223,538 | $20,558 | 2025-12 |
| Colorado Voters for Animals | Denver | 501(c)(4) | 2000 | $222,772 | $182,641 | 2025-12 |
| Pax Fauna | Denver | 501(c)(3) | 2020 | $217,386 | $12,917 | 2024-12 |
| Animal Dominion Rescue | Denver | 501(c)(3) | 2022 | $217,170 | $21,009 | 2024-12 |
| Rescued Friends Animal Sanctuary | Fort Collins | 501(c)(3) | 2016 | $215,494 | $676,415 | 2025-12 |
| The Bow Wow Buddies Foundation Inc | Westminster | 501(c)(3) | 2008 | $214,428 | $255,968 | 2024-12 |
| Forest Collective | Arvada | 501(c)(3) | 2023 | $213,529 | $83,131 | 2025-12 |
| Colorado Wildlife Federation Inc | Boulder | 501(c)(3) | 1977 | $213,165 | $43,839 | 2025-12 |
| Misfit Crew Sanctuary Inc | Colorado SPGS | 501(c)(3) | 2022 | $211,366 | $30,278 | 2024-12 |
| Friends of Charlies Place | Dumont | 501(c)(3) | 2008 | $204,514 | $741,467 | 2025-12 |
| Born Free Wildlife Rehabilitation | Steamboat SPR | 501(c)(3) | 1998 | $199,472 | $152,411 | 2025-12 |
| Upper Rio Grande Animal Society | Monte Vista | 501(c)(3) | 2010 | $197,988 | $245,499 | 2025-12 |
| Northern Colorado Friends of Ferals | Fort Collins | 501(c)(3) | 2011 | $197,819 | $494,395 | 2024-12 |
| Rocky Mountain House Rabbit Rescue | Erie | 501(c)(3) | 1998 | $197,411 | $1.4 million | 2024-12 |
| Pos Owner Dog Rescue | Golden | 501(c)(3) | 2020 | $195,699 | $42,032 | 2024-12 |
| Colorado Feline Foster Rescue | Morrison | 501(c)(3) | 2020 | $195,628 | $179,853 | 2025-12 |
| Rocky Mountain Wolf Project | Durango | 501(c)(3) | 2024 | $194,479 | $110,881 | 2025-12 |
| Eagle Valley Humane Society A Nonprofit Corporation | Eagle | 501(c)(3) | 1974 | $193,135 | $235,921 | 2024-12 |
| Fort Morgan Humane Society | Fort Morgan | 501(c)(3) | 2007 | $193,086 | $37,849 | 2025-12 |
| Rooster Sanctuary at Danzigs Roost | Bennett | 501(c)(3) | 2013 | $190,955 | $69,327 | 2025-12 |
| Sunrise Service Dogs Inc | Colorado SPGS | 501(c)(3) | 2020 | $190,732 | $23,994 | 2025-12 |
| Brighter Days Dog Rescue | Boulder | 501(c)(3) | 2017 | $190,413 | $36,959 | 2024-12 |
| Lucky Day Animal Rescue of Colorado | Aspen | 501(c)(3) | 2012 | $189,244 | $688,050 | 2024-12 |
| Dreamcatchers Equine Rescue LLC | Fountain | 501(c)(3) | 2009 | $188,045 | $88,637 | 2024-12 |
| League for Animals and People of the Summit | Frisco | 501(c)(3) | 1992 | $187,326 | $179,013 | 2024-12 |
| Denver Cat Rescue | Denver | 501(c)(3) | 2020 | $181,709 | $94,460 | 2024-12 |
| Second Chance Animal Rescue Foundation | Lamar | 501(c)(3) | 2005 | $181,546 | $292,279 | 2025-12 |
| Circle 2 Rescue | Evergreen | 501(c)(3) | 2014 | $180,780 | $19,015 | 2025-12 |
| Banditas Wild Horse Promise | Livermore | 501(c)(3) | 2021 | $180,148 | $164,566 | 2025-12 |
| Ferret Dreams Rescue & Adoption | Denver | 501(c)(3) | 2009 | $176,497 | $93,771 | 2024-12 |
| Hog Haven Farm | Deer Trail | 501(c)(3) | 2015 | $175,878 | $82,123 | 2025-12 |
| San Luis Valley Animal Welfare Society | Alamosa | 501(c)(3) | 2001 | $175,494 | $506,802 | 2025-12 |
| Mile High Rescue | Englewood | 501(c)(3) | 2026 | $174,828 | $1.6 million | 2024-12 |
| Telluride Humane Society | Telluride | 501(c)(3) | 2019 | $174,152 | $59,779 | 2024-12 |
| SLV Spay and Neuter Alliance | Alamosa | 501(c)(3) | 2023 | $173,288 | $93,787 | 2025-12 |
| Simmons & Associates Educational Fund Inc | Colorado SPGS | 501(c)(6) | 2003 | $169,401 | $385,970 | 2025-10 |
| Chihuahua & Small Dog Rescue Inc | Colorado SPGS | 501(c)(3) | 2006 | $169,294 | $201,247 | 2025-12 |
| Wolf Woods | Ignacio | 501(c)(3) | 1999 | $167,300 | $311,955 | 2025-08 |
| Karls Canine Krew | Colorado SPGS | 501(c)(3) | 2023 | $166,824 | $5,506 | 2025-12 |
| Dalmatian Rescue of Colorado | Colorado SPGS | 501(c)(3) | 2001 | $165,017 | $63,106 | 2025-12 |
| Old Dogs New Digs | Boulder | 501(c)(3) | 2016 | $163,800 | $151,862 | 2025-12 |
| Burro Base Camp Inc | Kiowa | 501(c)(3) | 2023 | $163,102 | $50,254 | 2025-12 |
| Safe Landing TB Horse Rescue and Sanctuary | Colorado SPGS | 501(c)(3) | 2015 | $161,820 | $206,873 | 2025-02 |
| Forgotten Felines Rescue | Wheat Ridge | 501(c)(3) | 2009 | $161,191 | $248,441 | 2025-12 |
| For Pets Sake Inc | Cortez | 501(c)(3) | 1995 | $160,540 | $176,013 | 2025-12 |
| Rocky Mountain Lab Rescue | Broomfield | 501(c)(3) | 2008 | $158,544 | $387,315 | 2025-12 |
| Liberty S Legacy Inc | Elizabeth | 501(c)(3) | 2016 | $158,351 | $95,946 | 2024-12 |
| Front Range Freedom Rescue Inc | Boulder | 501(c)(3) | 2019 | $157,795 | $19,905 | 2023-12 |
| Colorado Unwanted Horse Alliance | Thornton | 501(c)(3) | 2010 | $157,070 | $126,437 | 2024-12 |
| Allegiance Ranch and Equine Rescue Inc | Erie | 501(c)(3) | 2017 | $156,736 | $41,535 | 2025-12 |
| Friends of Lackota Animal Sanctuary | Nunn | 501(c)(3) | 2021 | $156,283 | $9,036 | 2024-12 |
| Tattered Tails Inc | Colorado Springs | 501(c)(3) | 2010 | $155,949 | $171,375 | 2024-12 |
| Ridgeback Rescue of the U S | Lyons | 501(c)(3) | 2006 | $154,978 | $108,777 | 2025-12 |
| Hoof and Paw West End Animal Assist | Nucla | 501(c)(3) | 2010 | $154,832 | $28,729 | 2025-12 |
| Animal Help Now | Boulder | 501(c)(3) | 2010 | $154,347 | $22,343 | 2025-12 |
| Rocky Mountain Horse Rescue | Arvada | 501(c)(3) | 2004 | $154,147 | $209,118 | 2024-12 |
| Colorado Conservation Alliance Inc | Littleton | 501(c)(6) | 2024 | $153,193 | $1,238 | 2025-12 |
| Loma Cat House Inc | Grand JCT | 501(c)(3) | 2005 | $152,624 | $74,984 | 2024-12 |
| New Hope Cattle Dogs Rescue & Rehoming | Aurora | 501(c)(3) | 2008 | $152,317 | $85,522 | 2025-12 |
| Knick O Time Horse Rescue and Rehabilitation | Longmont | 501(c)(3) | 2005 | $152,225 | $39,225 | 2024-12 |
| Iresq RR | Evergreen | 501(c)(3) | 2023 | $151,359 | $1,876 | 2023-12 |
| The Colorado Kennel Club | Franktown | 501(c)(4) | 2005 | $150,170 | $791,839 | 2025-12 |
| No Kill Colorado | Denver | 501(c)(3) | 2014 | $148,113 | $185,330 | 2025-12 |
| Paws N Hooves | Monument | 501(c)(3) | 1999 | $144,850 | $23,464 | 2024-12 |
| Equine Sanctuary of Ojai | Parker | 501(c)(3) | 2004 | $143,108 | $362,651 | 2024-12 |
| Delta County Citizens for Animal Welfare & Shelter | Paonia | 501(c)(3) | 1999 | $142,856 | $320,725 | 2025-12 |
| Harleys Hope Foundation | Colorado SPGS | 501(c)(3) | 2010 | $142,460 | $90,525 | 2025-06 |
| Spirit Keeper Equine Sanctuary | Yoder | 501(c)(3) | 2014 | $140,000 | $3,266 | 2025-12 |
| Vet Treks Foundation | Fort Collins | 501(c)(3) | 2016 | $138,183 | $23,413 | 2025-12 |
| Blackhat Humane Society | Durango | 501(c)(3) | 2003 | $136,774 | $96,741 | 2025-12 |
| Go Team Therapy Crisis and Airport Dogs Inc | Colorado Springs | 501(c)(3) | 2018 | $136,434 | $89,954 | 2025-12 |
| Rocky Mountain French Bulldog Rescue | Boulder | 501(c)(3) | 2017 | $136,345 | $1 | 2025-12 |
| Happy Paws Mobile Vet Clinic Inc | Colorado SPGS | 501(c)(3) | 2019 | $136,332 | $41,207 | 2025-12 |
| International Society of Aquatic Medicine | Fort Collins | 501(c)(3) | 2012 | $131,196 | $59,078 | 2026-04 |
| Wild Source Foundation | Golden | 501(c)(3) | 2021 | $129,420 | $66,897 | 2024-12 |
| Ans Angels Coalition Inc | Cedaredge | 501(c)(3) | 2024 | $126,647 | $183,798 | 2025-12 |
| Southern Colorado Kennel Club Inc | Pueblo | 501(c)(4) | 2005 | $125,166 | $160,912 | 2026-06 |
| Centaur Rising | Pine | 501(c)(3) | 2005 | $124,611 | $9,216 | 2024-12 |
| Pets of Aguirre Welfare Shelter Inc | Denver | 501(c)(3) | 2011 | $124,281 | $301,269 | 2025-12 |
| Tails of Two Cities | Boulder | 501(c)(3) | 2021 | $123,884 | $46,505 | 2025-12 |
| Colorado St Bernard Rescue Inc | Denver | 501(c)(3) | 2006 | $122,036 | $7,498 | 2025-12 |
| Search & Rescue Dogs of the United States | Lyons | 501(c)(3) | 1997 | $119,964 | $379,338 | 2025-12 |
| Rocky Mountain Great Dane Rescue Inc | Lakewood | 501(c)(3) | 2000 | $119,070 | $52,397 | 2025-12 |
| Feline Rescue Network Inc | Colorado SPGS | 501(c)(3) | 2008 | $116,538 | $242,565 | 2025-03 |
| Colorado Grey Hound Adoption | Littleton | 501(c)(3) | 1997 | $116,043 | $396,850 | 2026-03 |
| Red Fern Animal Rescue | Denver | 501(c)(3) | 2019 | $114,698 | $5,586 | 2024-12 |
| Faithfully K9 Service Dog and Dog Training | Conifer | 501(c)(3) | 2018 | $113,193 | $98,320 | 2025-12 |
| Creative Acres Inc | Brighton | 501(c)(3) | 2000 | $113,184 | $278,982 | 2025-12 |
| Friends of Retired Greyhounds | Eastlake | 501(c)(3) | 2001 | $112,800 | $108,214 | 2025-12 |
| Longmont Friends of Feral and Abandoned Cats | Longmont | 501(c)(3) | 2013 | $110,701 | $116,787 | 2025-12 |
| Wild Rose Mustang Advocacy Group Incorporated | Fort Collins | 501(c)(3) | 2018 | $109,517 | $47,007 | 2024-12 |
| Pet Association of Estes Park Inc | Estes Park | 501(c)(3) | 1986 | $109,050 | $648,102 | 2025-06 |
| Great Escape Inc | Hygiene | 501(c)(3) | 2012 | $108,623 | $28,530 | 2024-12 |
| Colorado Pug Rescue | Aurora | 501(c)(3) | 1998 | $108,489 | $71,439 | 2024-12 |
| Paradise Animal Welfare Society | Crested Butte | 501(c)(3) | 2005 | $108,325 | $425,387 | 2025-12 |
| Life Is Better Rescue | Denver | 501(c)(3) | 2011 | $107,915 | $292,019 | 2024-12 |
| Mile-Hi Golden Retriever Club | Johnstown | 501(c)(4) | 2011 | $107,197 | $9,784 | 2025-12 |
| North American Veterinary Anesthesia Society | Fort Collins | 501(c)(3) | 2017 | $106,688 | $146,235 | 2025-12 |
| Lipizzan Heritage Institute | Boulder | 501(c)(3) | 2025 | $106,563 | $91,844 | 2025-12 |
| Until Theyre Home | Fort Collins | 501(c)(3) | 2018 | $106,066 | $119,997 | 2024-12 |
| Special Needs Animal Care | Northglenn | 501(c)(3) | 2016 | $102,574 | $576 | 2025-12 |
| Heroes With Paws | Parker | 501(c)(3) | 2019 | $102,502 | $111,801 | 2025-12 |
| Dekati Giving | Pueblo West | 501(c)(3) | 2021 | $101,966 | $812,602 | 2024-12 |
| Colorado Animal Welfare League | Castle Rock | 501(c)(3) | 2010 | $101,698 | $61,747 | 2025-12 |
| National Versatility Ranch Horse Association | Colorado SPGS | 501(c)(3) | 2010 | $101,498 | $32,333 | 2023-12 |
| Colorado Beagle Rescue | Westminster | 501(c)(3) | 1998 | $100,676 | $634,167 | 2025-12 |
| Flatirons Kennel Club Inc | Lafayette | 501(c)(4) | 2024 | $98,026 | $63,392 | 2024-06 |
| Plum Creek Kennel Club of Colorado | Kiowa | 501(c)(4) | 2023 | $96,542 | $101,524 | 2025-12 |
| Outpaws | Peyton | 501(c)(3) | 2014 | $95,022 | $60,195 | 2024-12 |
| Front Range German Shepherd Rescue Inc | Denver | 501(c)(3) | 2024 | $92,533 | $371,329 | 2024-12 |
| Mustang Ambassador Program | Colorado Springs | 501(c)(3) | 2015 | $91,924 | $40,312 | 2024-12 |
| Pranadogs Behavior & Rehab Center | Durango | 501(c)(3) | 2018 | $91,000 | $14,187 | 2025-12 |
| From Forgotten To Forever Transport and Rescue | Walsenburg | 501(c)(3) | 2019 | $90,888 | $20,188 | 2025-05 |
| Sonflower Ranch Wildlife Rehabilitation Center | Brighton | 501(c)(3) | 2017 | $90,088 | $440,621 | 2025-12 |
| Annies Orphans | Durango | 501(c)(3) | 1997 | $89,483 | $11,994 | 2025-12 |
| Acres of Hope | Longmont | 501(c)(3) | 2017 | $89,248 | $9,066 | 2025-12 |
| Drifters Hearts of Hope Inc | Crawford | 501(c)(3) | 2014 | $88,878 | $76,048 | 2025-12 |
| International Institute for Astronautical Sciences Inc | Boulder | 501(c)(3) | 2015 | $88,646 | $128,730 | 2025-12 |
| Spring Creek Horse Rescue | Durango | 501(c)(3) | 2005 | $87,984 | $49,268 | 2025-12 |
| Rocky Mountain Collie and Sheltie Rescue Inc | Pueblo | 501(c)(3) | 2005 | $85,335 | $140,150 | 2025-12 |
| The Middle Way Sanctuary | Fairplay | 501(c)(3) | 2003 | $84,248 | $72,842 | 2024-12 |
| Snow Capped Shepherd Rescue Inc | Littleton | 501(c)(3) | 2007 | $83,407 | $27,482 | 2024-12 |
| Sweet Grass Advocacy for North American Equines | Rifle | 501(c)(3) | 2023 | $82,387 | $1 | 2025-12 |
| Custer County Search and Rescue Inc | Westcliffe | 501(c)(3) | 2008 | $82,123 | $208,332 | 2024-12 |
| Rez Vet | Clifton | 501(c)(3) | 2025 | $79,689 | $64,945 | 2025-12 |
| Back the Blue K-9 Force | Centennial | 501(c)(3) | 2016 | $79,264 | $192,247 | 2025-12 |
| Vintage Dog Rescue Inc | Littleton | 501(c)(3) | 2008 | $79,115 | $49,732 | 2025-12 |
| Bone Appetit Gala | Loveland | 501(c)(3) | 2024 | $79,033 | $19,007 | 2025-12 |
| Wild Aware | Evergreen | 501(c)(3) | 2021 | $79,032 | $42,523 | 2025-12 |
| Academy of Veterinary Consultants Foundation | Fort Collins | 501(c)(3) | 2019 | $78,830 | $283,221 | 2025-12 |
| Nica Paws Rescue & Clinic | Aspen | 501(c)(3) | 2018 | $77,102 | $297,816 | 2024-12 |
| Mini Blessings | Buena Vista | 501(c)(3) | 2011 | $76,911 | $83,712 | 2025-12 |
| Little Rescue On the Prairie | Log Lane VLG | 501(c)(3) | 2021 | $75,929 | $3,816 | 2025-12 |
| Annie and Millies Place | Longmont | 501(c)(3) | 2021 | $75,853 | $45,670 | 2025-06 |
| Colorado Animal Care Foundation | Lone Tree | 501(c)(3) | 2006 | $75,734 | $11,739 | 2025-08 |
| American German Shepherd Rescue Association Inc | Elizabeth | 501(c)(3) | 2000 | $75,415 | $126,833 | 2025-12 |
| Rugbys Rescue House | Pagosa SPGS | 501(c)(3) | 2020 | $74,569 | $28,463 | 2025-12 |
| Hope for Hooves | Franktown | 501(c)(3) | 2018 | $74,152 | $33,491 | 2025-12 |
| Mountain Gorilla Conservation Fund | Englewood | 501(c)(3) | 2001 | $73,978 | $132,551 | 2024-12 |
| Veterans Puppy for Life Organization | Denver | 501(c)(3) | 2016 | $73,608 | $17,203 | 2025-12 |
| Grand Valley Pets Alive | Grand JCT | 501(c)(3) | 2013 | $73,354 | $30,860 | 2025-12 |
| Peaceful Prairie Sanctuary | Deer Trail | 501(c)(3) | 2003 | $72,241 | $727,687 | 2025-12 |
| Colorado Wyoming Vizsla Rescue Group Inc | Colorado SPGS | 501(c)(3) | 2007 | $72,111 | $210,189 | 2025-12 |
| Durango Kennel Club | Durango | 501(c)(4) | 2017 | $70,628 | $75,268 | 2025-12 |
| The Dreampower Foundation | Elbert | 501(c)(3) | 1999 | $69,921 | $2,519 | 2025-12 |
| Piceance Mustangs | Meeker | 501(c)(3) | 2018 | $69,194 | $54,994 | 2025-12 |
| Colorado Corgis and Friends | Lakewood | 501(c)(3) | 2020 | $69,151 | $89,525 | 2025-12 |
| Gingersnap Rescue Ranch | Colorado SPGS | 501(c)(3) | 2020 | $68,861 | $618 | 2024-12 |
| Dog Agility of the Pikes Peak Region | Colorado SPGS | 501(c)(7) | 2024 | $66,989 | $23,897 | 2025-12 |
| Paws and Claws Puerto Vallarta | Denver | 501(c)(3) | 2023 | $66,943 | $26,608 | 2025-12 |
| Misfits Dog Rescue | Penrose | 501(c)(3) | 2015 | $66,371 | $148,763 | 2025-12 |
| Scroungy Dogs and Pretty Pups Rescue Inc | Loveland | 501(c)(3) | 2015 | $65,665 | $1 | 2025-12 |
| Whimpers To Wags Rescue Inc | Colorado SPGS | 501(c)(3) | 2020 | $65,105 | $102,421 | 2025-12 |
| Old Dog House | Yoder | 501(c)(3) | 2011 | $63,687 | $126,772 | 2025-12 |
| Arapahoe Kennel Club | Parker | 501(c)(4) | 2017 | $62,789 | $102,436 | 2025-12 |
| Four Hoof Acres Senior Home Inc | Penrose | 501(c)(3) | 2022 | $62,024 | $23,433 | 2025-12 |
| Pugs and Hugs Rescue Inc | Westminster | 501(c)(3) | 2025 | $60,863 | $4,766 | 2025-12 |
| Black Ops Rescue | Northglenn | 501(c)(3) | 2018 | $60,476 | $189,101 | 2025-12 |
| Dakota Ranch Inc | Matheson | 501(c)(3) | 2010 | $59,684 | $16,373 | 2024-12 |
| Edwards Foundtion for Rescuedanimals | Parker | 501(c)(3) | 2007 | $59,496 | $10,514 | 2025-12 |
| Lew Dog Gives | Pagosa SPGS | 501(c)(3) | 2025 | $59,483 | $26,334 | 2025-12 |
| Houghton Healing & Therapy | Calhan | 501(c)(3) | 2023 | $59,385 | $1 | 2025-12 |
| Terry-All Kennel Club Inc | Fort Lupton | 501(c)(5) | 2025 | $57,300 | $146,541 | 2026-05 |
| Majestic Canine Rescue | Yoder | 501(c)(3) | 2011 | $57,193 | $48,645 | 2025-12 |
| Thor and Athena S Promise Sanctuary | Falcon | 501(c)(3) | 2018 | $56,820 | $3,538 | 2025-12 |
| Saving Dobermankind Animal Rescue | Fountain | 501(c)(3) | 2024 | $56,759 | $66,535 | 2024-12 |
| Greyhound Connection LLC | Nunn | 501(c)(3) | 2008 | $56,577 | $70,138 | 2025-12 |
| My Fairy Dawg Mother Rescue Inc | Aurora | 501(c)(3) | 2012 | $56,503 | $22,967 | 2025-12 |
| Retriever Rescue of Colorado | Evergreen | 501(c)(3) | 2006 | $55,456 | $91,151 | 2025-12 |
| North American Versatile Hunting Dog Association-Rocky MTN Chapter | Nunn | 501(c)(3) | 2019 | $55,247 | $52,298 | 2025-12 |
| Good Dog Rescue | Fort Lupton | 501(c)(3) | 2017 | $53,577 | $73,705 | 2025-12 |
| Front Range Agility Club | Johnstown | 501(c)(4) | 2022 | $53,337 | $51,422 | 2025-12 |
| DMK Rehoming Inc | Littleton | 501(c)(3) | 2010 | $52,934 | $29,512 | 2025-12 |
| Blue Lion Rescue | Yoder | 501(c)(3) | 2010 | $52,406 | $225,471 | 2024-12 |
| No Hound Unhomed Inc | Colorado SPGS | 501(c)(3) | 2015 | $51,536 | $18,222 | 2023-12 |
| Journey Inward Ranch | Aurora | 501(c)(3) | 2021 | $50,329 | $13 | 2025-12 |
| Honor the Horse Foundation | Kiowa | 501(c)(3) | 2023 | $48,927 | $15,180 | 2025-12 |
| Pig Team | Larkspur | 501(c)(3) | 2024 | $47,799 | $4,548 | 2024-12 |
| Penguins International | Loveland | 501(c)(3) | 2017 | $47,010 | $39,683 | 2025-08 |
| Colorado Bullies & More | Rye | 501(c)(3) | 2022 | $46,988 | $5,939 | 2023-11 |
| Black Canyon Animal Sanctuary | Crawford | 501(c)(3) | 2011 | $44,452 | $17,628 | 2024-12 |
| Elder Pet Care | Fort Collins | 501(c)(3) | 1995 | $43,673 | $308,283 | 2025-12 |
| Steadfast Steeds | Grand JCT | 501(c)(3) | 2011 | $43,537 | $34,707 | 2025-12 |
| Hope for Paws Colorado | Englewood | 501(c)(3) | 2016 | $43,281 | $8,224 | 2025-05 |
| Palmer Divide Agility Club | Franktown | 501(c)(4) | 2012 | $42,033 | $85,984 | 2025-12 |
| Denver Samoyed Association Inc | Denver | 501(c)(4) | 2004 | $41,957 | $55,040 | 2025-12 |
| Spirit Wind Horse Rescue | Hotchkiss | 501(c)(3) | 2009 | $41,634 | $9,791 | 2025-12 |
| Project Thrive | Hudson | 501(c)(3) | 2012 | $39,686 | $30,269 | 2025-12 |
| Association of Midwest Fish and Game Law Enforcement Officers | Fruita | 501(c)(3) | 1995 | $38,897 | $78,680 | 2025-12 |
| Julie S Friends | Monument | 501(c)(3) | 2022 | $38,021 | $28,218 | 2024-12 |
| Giving Paw Inc | Englewood | 501(c)(3) | 2012 | $37,789 | $47,230 | 2025-12 |
| White Rose Sanctuary | Colorado SPGS | 501(c)(3) | 2022 | $37,215 | $840 | 2025-12 |
| Horse and Human Rescue | Ridgway | 501(c)(3) | 2017 | $37,052 | $2,207 | 2024-12 |
| Foco Top Dog | Fort Collins | 501(c)(3) | 2021 | $35,416 | $3,935 | 2025-12 |
| National Mustang Association Inc | Cortez | 501(c)(3) | 2020 | $34,679 | $109,829 | 2025-12 |
| Los Huerfanos Animal Welfare Association | Walsenburg | 501(c)(3) | 2010 | $31,989 | $30,327 | 2025-12 |
| Fostering Love Rescues | Larkspur | 501(c)(3) | 2020 | $30,709 | $49,979 | 2025-12 |
| Paws On the Ground Colorado | Littleton | 501(c)(3) | 2016 | $30,644 | $42,625 | 2025-12 |
| Planned Pethood Assistance Inc | Leadville | 501(c)(3) | 1999 | $29,657 | $89,393 | 2025-12 |
| Backbone Animal Rescue | Loveland | 501(c)(3) | 2025 | $28,749 | $1,072 | 2026-01 |
| Canine Community Heros Inc | Greeley | 501(c)(3) | 2014 | $27,572 | $8,703 | 2025-06 |
| Sacred Wolf Foundation | Snowmass | 501(c)(3) | 2023 | $27,347 | $44,836 | 2025-12 |
| Peace Love & Paws | Denver | 501(c)(3) | 2016 | $26,635 | $20,199 | 2025-12 |
| Beast of Burden Recovery and Education Center Inc | Castle Rock | 501(c)(3) | 2024 | $22,804 | $598 | 2025-12 |
| Karmasue | Aurora | 501(c)(3) | 2016 | $21,194 | $40,148 | 2025-12 |
| Great Pyrenees Rescue and Sanctuary Inc | Peyton | 501(c)(3) | 2011 | $17,460 | $11,113 | 2025-12 |
| Hope Through Horses Inc | Denver | 501(c)(3) | 2018 | $15,957 | $57,036 | 2025-12 |
| Yoga Animals Rescue Foundation | Westminster | 501(c)(3) | 2024 | $15,406 | $7,187 | 2024-12 |
| Pueblo Spay & Neuter Now | Pueblo | 501(c)(3) | 2023 | $14,550 | $13,000 | 2024-12 |
| Wild Horse Outreach & Advocacy | Guffey | 501(c)(3) | 2020 | $14,204 | $22,621 | 2024-12 |
| Docs On the Blocks | Denver | 501(c)(3) | 2004 | $13,896 | $10 | 2025-12 |
| Noahs Ark Animal Welfare Association | Trinidad | 501(c)(3) | 1999 | $13,390 | $6,867 | 2025-12 |
| Kriegers Hooves Or Paws Eternal Sanctuary | Fleming | 501(c)(3) | 2022 | $13,251 | $3,310 | 2025-12 |
| Equine Partnership Program | Centennial | 501(c)(3) | 2006 | $12,136 | $151,992 | 2025-12 |
| Alaskan Malamute Assistance League | Golden | 501(c)(3) | 2000 | $11,921 | $135,402 | 2024-12 |
| Friends of Horses Rescue and Adoption Incorporated | Centennial | 501(c)(3) | 2013 | $10,735 | $9,804 | 2024-12 |
| Friends of Sierra | Niwot | 501(c)(3) | 2019 | $10,580 | $10,304 | 2025-12 |
| Daisy Chain LTD | Denver | 501(c)(3) | 2017 | $9,955 | $4,568 | 2025-12 |
| Timberline Basset Hound Club | Boulder | 501(c)(4) | 2009 | $9,573 | $2,372 | 2026-03 |
| Ruff Inc | Englewood | 501(c)(3) | 2006 | $8,370 | $10,615 | 2025-12 |
| Nocokitties | Loveland | 501(c)(3) | 2019 | $6,069 | $4,656 | 2019-12 |
| Tour de Corgi LLC | Fort Collins | 501(c)(3) | 2022 | $2,812 | $6,188 | 2025-12 |
| The Valley Humane League | La Jara | 501(c)(3) | 1981 | $2,645 | $73,761 | 2025-12 |
| Forever Loving Homes | Denver | 501(c)(3) | 2022 | $1,959 | $448 | 2025-12 |
| Animal Help Alliance Inc | Lakewood | 501(c)(3) | 2015 | $1,250 | $1,958 | 2024-12 |
| Friends of Switzerland Trail | Boulder | 501(c)(3) | 2024 | $1,000 | $1,000 | 2024-12 |
| Telluride Animal Foundation | Telluride | 501(c)(3) | 2012 | $502 | $15,562 | 2025-12 |
| Furever Donny Rescue | Loveland | 501(c)(3) | 2022 | $129 | $1,082 | 2023-12 |
| Animal Action Network | Golden | 501(c)(3) | 2015 | $50 | $50 | 2024-12 |
| Recycled Racers | Commerce City | 501(c)(3) | 1994 | $5 | $19,278 | 2025-12 |
| 4 Paws Pet Pantry | Fort Collins | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| 9 Lives Rescue | Colorado SPGS | 501(c)(3) | 1998 | $0 | $0 | 2026-03 |
| A Cat Rescue Out in the Sticks | Eckley | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| A To Z Home Vet Care Initiative Inc | Aurora | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Abbys Fund | Mead | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Adams County Retired K9 Foundation | Keenesburg | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Advance Service Dogs LTD | Canon City | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| African Horse Safaris Foundation LTD | Centennial | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| After the Show Equine Sanctuary | Elbert | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Agiwildlife | Aurora | 501(c)(3) | 2024 | $0 | $0 | 2024-04 |
| Ahimsa Foundation | Niwot | 501(c)(3) | 2021 | $1.01 billion | 2024-12 | |
| Alasipsee Ranch | Briggsdale | 501(c)(3) | 2022 | $0 | $0 | 2025-08 |
| All Creatures Rocky Mountain Sanctuary | Florissant | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| All Mixed Up Dog Rescue | Fort Morgan | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| All Points West German Shorthaired Pointer Rescue | Elizabeth | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Allys Haven | Loveland | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| American Association of Zoo Keepers | Denver | 501(c)(3) | 1992 | $0 | $0 | 2025-12 |
| American Lhasa Apso Club Rescue | Loveland | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Angel Heart Animal Care & Sanctuary Inc | Penrose | 501(c)(3) | 2019 | $105,198 | 2024-12 | |
| Animal Aid of Colorado Inc | Berthoud | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Animal Assistance League of Northwe St Colorado | Steamboat SPR | 501(c)(3) | 2026 | $0 | $0 | 2021-12 |
| Animal Counsel Inc | Boulder | 501(c)(3) | 2025 | $0 | $0 | 2026-03 |
| Animal Evac Volunteers Inc | Golden | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Animal Interest League and Sanctuary | Delta | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Animal Kingdom Foundation | Longmont | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Another Chance Critter Haven LLC | Eckert | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Apple Valley Farm Sanctuary | Penrose | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Arc-Animal Rehabilitation Center Inc | Pagosa SPGS | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Archway Adventures | Greeley | 501(c)(3) | 1996 | $0 | $0 | 2025-12 |
| Art of Rescue | Parker | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Baco Fund | Denver | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Baileys Love | Castle Rock | 501(c)(3) | 2026 | |||
| Barkleys Hope | Grand JCT | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Barnwater Cats Rescue Organization | Denver | 501(c)(3) | 1998 | $0 | $0 | 2025-09 |
| Basset Rescue of Southwest Colorado | Grand JCT | 501(c)(3) | 2015 | $0 | $0 | 2026-02 |
| Bat Health Foundation | Fort Collins | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Beacon Animal Care | Arvada | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Bear Paw Connections | Evergreen | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Bentley Memorial Fund | Kersey | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Besa Animal Rescue | Fruita | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Best Horse Practices Summit Inc | Dolores | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Best Pets Inc | Boulder | 501(c)(3) | 2006 | $0 | $0 | 2024-12 |
| Bird Rescue | Fort Collins | 501(c)(3) | 2021 | $0 | $0 | 2023-12 |
| Birmingham Foundation | Loveland | 501(c)(3) | 2020 | $777,301 | 2025-12 | |
| Biscuits Buddies | Castle Rock | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Bitcoin for Bullies Inc | Denver | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Black Canyon Audubon Society | Montrose | 501(c)(3) | 2002 | $0 | $0 | 2026-06 |
| Black Dog Rescue | Berthoud | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Black Sky | Colorado SPGS | 501(c)(3) | 2023 | $46,932 | 2024-12 | |
| Blake S Haven Inc | Denver | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Blue Sky Satos Animal Rescue | Littleton | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Blue Skye Ranch Inc | Springfield | 501(c)(3) | 2025 | |||
| Born for More | Denver | 501(c)(3) | 2024 | |||
| Boulder Bear Coalition | Boulder | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Boulder Bird Banding Association | Boulder | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Boulder County Lost Pet Rescue | Lakewood | 501(c)(3) | 2026 | |||
| Brandi Crawford International Veterinarian Foundation | Erie | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Broken Halo Rescue Inc | Johnstown | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Buddys Builders | Aurora | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| Buddys House | Loveland | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Cairn Terrier Club of Denver | Trinidad | 501(c)(4) | 2018 | $0 | $0 | 2025-12 |
| Calvary Farms Outreach | Bennett | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Candles for Canines | Loveland | 501(c)(3) | 2024 | $1 | 2025-12 | |
| Canine Defender Network | Castle Rock | 501(c)(3) | 2024 | |||
| Care for Canines | Denver | 501(c)(3) | 2026 | |||
| Care for Strays Inc | Golden | 501(c)(3) | 2011 | $0 | $0 | 2024-12 |
| Careagain | Florissant | 501(c)(3) | 2002 | $0 | $0 | 2024-12 |
| Caring Canines LTD | Loveland | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Casita Paloma | Broomfield | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Cat Barn | Canon City | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Cat Care Network of Colorado and New Mexico | Pueblo | 501(c)(3) | 2007 | $0 | $0 | 2023-12 |
| Catamount Wildlife Center | Woodland Park | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Catch-22 Rescue | Erie | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Cats Alive SLV | Alamosa | 501(c)(3) | 2013 | $0 | $0 | 2026-04 |
| Cavallis Husky and Wolfdog Rescue | Fountain | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Cavies and Canines Animal Rescue | Wellington | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Cavy Care Inc | Aurora | 501(c)(3) | 2000 | $0 | $0 | 2025-12 |
| Caylebs Kindred Senior Dog Rescue | Denver | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Centennial Schutzhund Club DVG | Fort Collins | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Charis Youth Ranch Home of New Life Thoroughbreds | Fort Collins | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Cheetah Defenders Alliance Inc | Denver | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Chris PS Rescue and Rehabilitation | Pierce | 501(c)(3) | 2022 | $5,101 | 2024-12 | |
| Citos Rescue | Loveland | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Clawa Animal Rescue | Thornton | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Clover Ridge Farm Animal Sanctuary Inc | Longmont | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Clumsy Calico Cat Cafe | Fort Collins | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Cocos Haven LLC | Brighton | 501(c)(3) | 2024 | |||
| Cold Blooded and Cuddly Care Inc | Peyton | 501(c)(3) | 2026 | |||
| Collinskeep | Arvada | 501(c)(3) | 2023 | |||
| Coloradans for Responsible Wildlife Management Foundation | Canon City | 501(c)(3) | 2025 | |||
| Colorado Akbash Foundation | Steamboat SPR | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Colorado Animal Protectors | Denver | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Colorado Animal Rescue Surgical Services | Hudson | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Colorado Arabian Breeders Alliance | Elizabeth | 501(c)(5) | 2007 | $0 | $0 | 2025-09 |
| Colorado Avian Research and Rehabilitation Institute Inc | Estes Park | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Colorado Batcrew | Conifer | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Colorado Bear Coalition | Boulder | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Colorado Bird at Las Partnership | Denver | 501(c)(3) | 1987 | $0 | $0 | 2025-12 |
| Colorado Boer Goat Association | Briggsdale | 501(c)(3) | 2023 | $0 | $0 | 2025-01 |
| Colorado Canine Coalition | Windsor | 501(c)(3) | 2024 | |||
| Colorado Citizens for Canine Welfare | Denver | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Colorado Companion Animal Sanctuary | Bailey | 501(c)(3) | 2017 | $0 | $0 | 2024-12 |
| Colorado Domestic Duck Rescue | Wheat Ridge | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Colorado Driving Society | Kiowa | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Colorado Earthdogs Inc | New Castle | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Colorado Equine Colic Fund | Mesa | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Colorado Farm Animal Sanctuary | Boulder | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Colorado Feedlot Horses Corp | Golden | 501(c)(3) | 2015 | $0 | $0 | 2023-12 |
| Colorado Fish Rescue | Arvada | 501(c)(3) | 2025 | |||
| Colorado Herding Dog Rescue | Denver | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Colorado Horse Education and Equine Rescue | Brighton | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Colorado Husky Rescue | Aguilar | 501(c)(3) | 2021 | $0 | $0 | 2025-01 |
| Colorado Japanese Chin Rescue | Aurora | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Colorado Kat Kitty Allies and TNR Coalition | Cedaredge | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Colorado Native Bird Care and Conservation | Lyons | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
Read from the IRS Exempt Organizations Business Master File, updated by the IRS on October 24, 2026 and rebuilt here every morning. Revenue and assets are from each organization's latest filing as the IRS lists it; the IRS record is the official one. Organizations only: no people are named on these pages.