Data / Nonprofits / Iowa / Mason City
Nonprofits in Mason City, IA: 229 registered with the IRS
229 nonprofits are registered with the IRS in Mason City, IA, 176 of them 501(c)(3) charities; the 80 that report revenue took in $125.2 million. The largest by revenue: Good Shepherd Geriatric Center Inc ($22.5 million), Prairie Ridge Integrated Behavioral Healthcare ($14.9 million), North Iowa Vocational Center Inc ($12 million). Most common causes: education (17), philanthropy, voluntarism and grantmaking foundations (15), recreation and sports (14).
SpecStream is the live web data engine for teams and agents. It reads the IRS register of exempt organizations as the IRS updates it, and this page is that reading. Ask for the nonprofits you need by place, cause and size, with their latest Form 990 figures and websites, and they arrive in your sheet, CRM, Slack or agent.
Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Good Shepherd Geriatric Center Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 1963 | $22.5 million | $51.3 million | 2025-09 |
| Prairie Ridge Integrated Behavioral Healthcare | Mental health and crisis intervention | 501(c)(3) | 1970 | $14.9 million | $31 million | 2025-06 |
| North Iowa Vocational Center Inc | 501(c)(3) | 1970 | $12 million | $10.7 million | 2025-06 | |
| North Iowa Community Action Organization | 501(c)(3) | 1967 | $11.3 million | $6.7 million | 2025-09 | |
| North Iowa Area Community College Foundation | Education | 501(c)(3) | 1969 | $8.7 million | $53.1 million | 2025-06 |
| Iowa Odd Fellows and Orphans Home | Human services | 501(c)(3) | 1993 | $8.2 million | $10.7 million | 2025-07 |
| Elderbridge Agency On Aging | Human services | 501(c)(3) | 1983 | $5.8 million | $2.8 million | 2025-06 |
| Charlie Brown Community Day Care Center | 501(c)(3) | 1969 | $4.2 million | $4.6 million | 2025-09 | |
| Young Mens Christian Association | Human services | 501(c)(3) | 1958 | $4.2 million | $3.7 million | 2025-09 |
| Mason City Clinic P C Trust | 501(c)(9) | 1991 | $2.5 million | $642,880 | 2025-12 | |
| Collaborative Summer Library Program | Human services | 501(c)(3) | 2024 | $2.4 million | $2.5 million | 2025-05 |
| Habitat for Humanity International Inc | 501(c)(3) | 1987 | $1.8 million | $4.8 million | 2025-06 | |
| Baum-Harmon Mercy Hospital | Health care | 501(c)(3) | 2002 | $1.8 million | $403,464 | 2025-06 |
| Niad Center for Human Development | 501(c)(3) | 1978 | $1.6 million | $630,694 | 2025-06 | |
| Youth for Christ USA Inc | 501(c)(3) | 1954 | $1.6 million | $820,202 | 2025-06 | |
| Hawkeye Harvest Food Bank Corporation | Food, agriculture and nutrition | 501(c)(3) | 1982 | $1.5 million | $2.7 million | 2025-08 |
| Newman High School Foundation | 501(c)(3) | 1978 | $1.5 million | $27.6 million | 2025-06 | |
| Humane Society of North Iowa | Animal-related | 501(c)(3) | 1965 | $1.3 million | $4.8 million | 2024-12 |
| YMCA and Rehabilitation Center | Human services | 501(c)(3) | 1999 | $1.3 million | $2.5 million | 2024-12 |
| Community Kitchen of North Iowa | Food, agriculture and nutrition | 501(c)(3) | 1987 | $1 million | $895,488 | 2024-12 |
| North Iowa Christian School Inc | 501(c)(3) | 1985 | $980,468 | $2.4 million | 2025-06 | |
| Niacog Housing Trust Fund Inc | Housing and shelter | 501(c)(3) | 2011 | $911,263 | $544,238 | 2025-12 |
| Mason City Foundation | Environment | 501(c)(3) | 1991 | $909,263 | $5.7 million | 2024-12 |
| North Iowa Fair Association | Recreation and sports | 501(c)(3) | 1993 | $804,932 | $1.6 million | 2025-09 |
| Mason City Chamber of Commerce | 501(c)(6) | 1942 | $790,227 | $1.4 million | 2025-09 | |
| Education Foundation of the Mason City Public Schools | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1996 | $785,100 | $3.4 million | 2025-06 |
| North East Iowa Local Workforce Development Board | Employment | 501(c)(3) | 2023 | $763,407 | $667,204 | 2025-06 |
| United Way of North Central Iowa | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1942 | $746,698 | $1.3 million | 2025-06 |
| North Iowa Corridor Economic Development Corporation | Community improvement and capacity building | 501(c)(6) | 2005 | $659,302 | $2.3 million | 2025-06 |
| Mercy Medical Center Foundation North Iowa | Health care | 501(c)(3) | 1984 | $617,194 | $5.2 million | 2025-06 |
| Mason City Chamber of Commerce Foundation | Community improvement and capacity building | 501(c)(3) | 2000 | $614,375 | $121,819 | 2025-09 |
| Mason City Youth Hockey Association Inc | Recreation and sports | 501(c)(3) | 1977 | $533,174 | $398,716 | 2025-05 |
| Friends of Seoul Foreign School Inc | International, foreign affairs and national security | 501(c)(3) | 1972 | $377,811 | $4.7 million | 2025-06 |
| Northern Lights Alliance for the Homeless Inc | Housing and shelter | 501(c)(3) | 2002 | $330,736 | $1.1 million | 2025-06 |
| T L C Broadcasting Corporation | 501(c)(3) | 1978 | $312,835 | $448,474 | 2024-12 | |
| Visit Mason City Inc | Community improvement and capacity building | 501(c)(6) | 2013 | $300,842 | $328,527 | 2025-09 |
| Shalom Tower Two Inc | 501(c)(3) | 1980 | $287,167 | $1 million | 2025-09 | |
| Stebens Childrens Theatre | 501(c)(3) | 1986 | $253,908 | $344,959 | 2025-06 | |
| Prairie Place On 1St Inc | Housing and shelter | 501(c)(4) | 2015 | $240,732 | $5.8 million | 2025-09 |
| Caring Pregnancy Center | Health care | 501(c)(3) | 1988 | $235,531 | $440,336 | 2025-12 |
| Mason City Mohawk Booster Club | Education | 501(c)(3) | 2019 | $228,984 | $314,293 | 2025-05 |
| Gas & Electric Employees Credit Union | 501(c)(14) | $216,805 | $4.4 million | 2024-12 | ||
| Iowa Farm Bureau Federation | 501(c)(5) | 1957 | $196,499 | $2.2 million | 2025-12 | |
| Wright On the Park Inc | Arts, culture and humanities | 501(c)(3) | 2006 | $179,261 | $18.8 million | 2024-12 |
| River City Sculptures On Parade Inc | Arts, culture and humanities | 501(c)(3) | 2014 | $177,748 | $249,372 | 2025-06 |
| My Happy Place Inc | 501(c)(3) | 2019 | $171,506 | $123,760 | 2023-12 | |
| Freedom Inn His Grace Ministry | Human services | 501(c)(3) | 2018 | $164,705 | $414,375 | 2025-12 |
| Senior Citizens Center | 501(c)(3) | 1962 | $164,243 | $91,041 | 2025-06 | |
| Mason City Lodge 1328 Loyal Order of Moose | 501(c)(8) | 1935 | $156,789 | $498,974 | 2025-04 | |
| Veterans of Foreign Wars of the United States Dept of Iowa | 501(c)(19) | 1951 | $139,054 | $450,366 | 2025-12 | |
| International Brotherhd - Boilrmkrs Ir SHP BLDRS BLCKSMTH FRGRS & HLPR | 501(c)(5) | 1954 | $127,650 | $57,705 | 2025-12 | |
| Christmas Cheer Fund Inc | Human services | 501(c)(3) | 1979 | $126,192 | $370,309 | 2026-02 |
| Mason City Schools Instrumental Music Boosters Foundation | Education | 501(c)(3) | 2024 | $110,492 | $201,628 | 2020-12 |
| Central Services 2 5 12 Inc | Community improvement and capacity building | 501(c)(2) | 2010 | $100,805 | $668,830 | 2025-06 |
| Donald J Beck Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2018 | $100,046 | $2 million | 2025-12 |
| Persevering One Step at A Time Foundation | Health care | 501(c)(3) | 2025 | $99,350 | $73,193 | 2025-12 |
| North Iowa Volleyball Association | Recreation and sports | 501(c)(3) | 2021 | $83,657 | $59,078 | 2025-07 |
| Mason City Downtown Association | Education | 501(c)(3) | 2003 | $79,624 | $90,096 | 2024-12 |
| River City Society for Historic Preservation | 501(c)(3) | 1988 | $78,163 | $741,341 | 2025-03 | |
| Macnider Art Museum Foundation | Arts, culture and humanities | 501(c)(3) | 1996 | $77,875 | $1.5 million | 2025-06 |
| Baum Harmon Mercy Hospital and Clinics Foundation | Health care | 501(c)(3) | 2010 | $74,951 | $1.9 million | 2025-06 |
| Meals On Wheels of Mason City Inc | 501(c)(3) | 1970 | $72,934 | $145,814 | 2025-12 | |
| Mason City Soccer Club | Recreation and sports | 501(c)(3) | 2016 | $64,906 | $90,141 | 2023-06 |
| Rotary International | 501(c)(4) | 1966 | $57,985 | $7,969 | 2024-06 | |
| Rifle & Pistol Club River City | 501(c)(7) | 1968 | $55,676 | $692,261 | 2025-12 | |
| Mason City Community Theatre Inc | Arts, culture and humanities | 501(c)(3) | 1969 | $54,332 | $57,865 | 2025-07 |
| Masonic Temple Association of Mason City | 501(c)(2) | 1981 | $53,929 | $529,099 | 2025-12 | |
| North Iowa Band Festival Foundation | Housing and shelter | 501(c)(3) | 1997 | $53,101 | $99,787 | 2025-09 |
| Mason City Little League Inc D B A Mason City Youth Baseball | Youth development | 501(c)(3) | 1990 | $51,479 | $201,894 | 2025-08 |
| Good Shepherd Telephone Reassurance Inc | Mental health and crisis intervention | 501(c)(3) | 1995 | $42,403 | $290,139 | 2025-09 |
| Iowa Operation Lifesaver | Public safety, disaster preparedness and relief | 501(c)(3) | 2002 | $41,648 | $7,727 | 2025-12 |
| Pioneer Museum & Historical Society of North Iowa | 501(c)(3) | 1965 | $40,277 | $119,063 | 2025-12 | |
| North Iowa Figure Skating Club | Recreation and sports | 501(c)(3) | 2019 | $39,675 | $16,504 | 2023-05 |
| Living Free Ministries | Religion-related | 501(c)(3) | 2016 | $34,286 | $45,704 | 2026-04 |
| Mohawk Danzers Mason City | Arts, culture and humanities | 501(c)(3) | 2023 | $33,967 | $12,111 | 2025-06 |
| Mason City Public Library Foundation Inc | 501(c)(3) | 1986 | $25,564 | $710,152 | 2025-06 | |
| Harding Elementary Parent Teacher Organization | Education | 501(c)(3) | 1996 | $24,095 | $51,909 | 2023-06 |
| Jefferson Parent-Teacher Organization | Education | 501(c)(3) | 1996 | $21,143 | $39,672 | 2025-06 |
| My Happy Place | Health care | 501(c)(3) | 2019 | $12,328 | $69,744 | 2024-12 |
| 4-H Clubs & Affiliated 4-H Organizations | Youth development | 501(c)(3) | 1999 | $0 | $0 | 2025-12 |
| Aging Services Coalition of North Iowa | Human services | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Agva Foundation | Food, agriculture and nutrition | 501(c)(3) | 2018 | $194,325 | 2024-12 | |
| Al A Lake T W 3CB537000 Norwest Bank of Des Moines NA Ttee | 501(c)(3) | 1966 | $130,526 | 2025-12 | ||
| Alano Society Inc of Mason City Iowa | Human services | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| American Federation of State County & Municipal Employees | 501(c)(5) | 1957 | $0 | $0 | 2025-12 | |
| American Federation of State County & Municipal Employees | 501(c)(5) | 1957 | $0 | $0 | 2025-12 | |
| American Legion | 501(c)(19) | 1946 | $0 | $0 | 2025-12 | |
| American Womens Self Defense Association | Crime and legal-related | 501(c)(3) | 1995 | |||
| Ancient Free & Accepted Masons of Iowa | 501(c)(10) | 1941 | $0 | $0 | 2025-12 | |
| Ancient Free & Accepted Masons of Iowa | 501(c)(10) | 1972 | $0 | $0 | 2025-12 | |
| Bakery Confectionery Tobacco Workers and Grain Millers Intl Uni | 501(c)(5) | 1949 | $0 | $0 | 2023-03 | |
| Beasley Family Foundation Inc | 501(c)(3) | 1987 | $469,056 | 2025-09 | ||
| Bertha Stebens Childrens Theatre Foundation | Arts, culture and humanities | 501(c)(3) | 2002 | $0 | $0 | 2025-06 |
| Beth E Reinhart Charitable Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2015 | $4.1 million | 2025-06 | |
| Bethlehem Lutheran Church | 501(c)(3) | 1941 | ||||
| Bible Truth Hall of Clarksville Iowa | Religion-related | 501(c)(3) | 2001 | |||
| Brotherhood of Locomotive Engineers and Trainmen | 501(c)(5) | 1940 | $0 | $0 | 2025-12 | |
| C Joseph Plan K Money Purchase Plan | 501(c)(92) | 1996-02 | ||||
| CFT Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2001 | $6.8 million | 2025-12 | |
| Catholic Daughters of the Americas | 501(c)(3) | 1972 | ||||
| Central Springs Wrestling Club | Recreation and sports | 501(c)(3) | 2026 | |||
| Cerro Gordo County Medical Society | 501(c)(6) | 1956 | $0 | $0 | 2025-11 | |
| Cerro Gordo Trails Inc | Recreation and sports | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Cerro Gordo Trap Neuter Return and Wildlife Rescue | Animal-related | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Choral Music Guild Inc | Arts, culture and humanities | 501(c)(3) | 1994 | $0 | $0 | 2025-12 |
| Clausen-Worden Post 101 Dept of Iowa American Legion Auxiliary | Public and societal benefit | 501(c)(19) | 2014 | $0 | $0 | 2025-06 |
| Community Education Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2015 | $100,742 | 2025-12 | |
| Community Fellowship Church | 501(c)(3) | 1983 | ||||
| Daughters of Union Veterans of the Civil War 1861-1865 | Public and societal benefit | 501(c)(3) | 2014 | $0 | $0 | 2025-08 |
| Daughters of Union Veterans of the Civil War 1861-1865 | Public and societal benefit | 501(c)(3) | 2014 | $0 | $0 | 2025-08 |
| David & Phyllis Murphy Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1998 | $10.1 million | 2025-06 | |
| Delta Kappa Gamma Society | 501(c)(6) | 1965 | $0 | $0 | 2026-06 | |
| Department of Iowa Auxiliary To the Veterans of Foreign Wars | Public and societal benefit | 501(c)(19) | 2009 | $0 | $0 | 2026-06 |
| Doris and Ralph Preuss Charitable Trust | 501(c)(92) | $3.2 million | 2025-12 | |||
| Down Syndrome Association of North Central Iowa | Diseases, disorders and medical disciplines | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| E R Keig and Alice Keig Scholarship Trust | 501(c)(3) | 1991 | $620,559 | 2025-12 | ||
| Elaine M Lane Testamentary Trust | Education | 501(c)(3) | 2018 | $126,666 | 2025-12 | |
| Empower Youth Honduras Inc | Youth development | 501(c)(3) | 2025 | |||
| Epiphany Parish Mason City Iowa | 501(c)(3) | 1946 | ||||
| Farrer Endowment Foundation | 501(c)(3) | 1984 | $6 million | 2025-12 | ||
| Field Memorial Scholarship Trust | Education | 501(c)(3) | 1995 | $469,024 | 2025-12 | |
| First Assembly of God | 501(c)(3) | 1964 | ||||
| First Baptist Church | 501(c)(3) | 1955 | ||||
| First Christian Church | 501(c)(3) | 1951 | ||||
| First Citizens Charitable Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1996 | $1.2 million | 2025-12 | |
| First Convenant Church Mason City Ia | 501(c)(3) | 1975 | 2012-12 | |||
| Free Methodist Church of Mason City Iowa | 501(c)(3) | 1958 | ||||
| Friends of the Library Mason City | Education | 501(c)(3) | 2010 | $0 | $0 | 2026-06 |
| Full Gospel Fellowship | 501(c)(3) | 1990 | ||||
| Future Farmers of America Ia14081 Tall Corn Ffa Alumni Association | Youth development | 501(c)(3) | 2018 | $45,663 | 2025-12 | |
| Future Problem Solving Program International Inc | 501(c)(3) | 1993 | $0 | $0 | 2026-06 | |
| Gardeners of North Iowa | 501(c)(3) | 2012 | $0 | $0 | 2025-12 | |
| Givers USA | Human services | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Grace Evangelical Free Church | 501(c)(3) | 1965 | 2013-12 | |||
| Hanford Community Church | 501(c)(3) | 1971 | ||||
| Harbor of New Hope Church | Religion-related | 501(c)(3) | 2021 | |||
| Harvest Time Ministries International Inc | Religion-related | 501(c)(3) | 2003 | |||
| Haydens Hope | Health care | 501(c)(3) | 2016 | $0 | $0 | 2026-04 |
| Herbert Hoover Parent Teacher Organizaion | Education | 501(c)(3) | 2026 | $0 | $0 | 2026-06 |
| Horsemen of Iowa Inc | 501(c)(6) | 1985 | $0 | $0 | 2026-03 | |
| Human Resources Association of North Iowa | Community improvement and capacity building | 501(c)(6) | 2024 | |||
| International Association of Fire Fighters | 501(c)(5) | 1966 | $0 | $0 | 2025-12 | |
| International Association of Lions Clubs | Community improvement and capacity building | 501(c)(4) | 1940 | $0 | $0 | 2025-06 |
| International Association of Ministries Inc | 501(c)(3) | 1987 | ||||
| Iowa Association of Women Police | Community improvement and capacity building | 501(c)(6) | 2019 | $0 | $0 | 2024-12 |
| Iowa Independent Film Festival | Arts, culture and humanities | 501(c)(3) | 2013 | $0 | $0 | 2024-12 |
| Iowa State Policemens Association-18 | Mutual and membership benefit | 501(c)(4) | 2018 | $0 | $0 | 2025-12 |
| Iowa Underwater Search & Rescue Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Iowa Yearly Meeting of Friends | 501(c)(3) | 1975 | ||||
| Kinney-Lindstrom Foundation Inc | 501(c)(3) | 1958 | $8.9 million | 2025-12 | ||
| Kiwanis Club of Mason City River City Foundation | Youth development | 501(c)(3) | 2025 | $0 | $0 | 2025-09 |
| Kiwanis International Inc | 501(c)(4) | 1940 | $0 | $0 | 2025-09 | |
| Knights Templar of the United States of America | 501(c)(10) | 1972 | $0 | $0 | 2025-06 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2023-12 | |
| Koester Non-Profit Services | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Laverna M Smedley Charitable Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $1.5 million | 2025-12 | |
| League of Women Voters of North Iowa | Civil rights, social action and advocacy | 501(c)(4) | 2022 | $0 | $0 | 2026-06 |
| Lee Endowment Foundation | 501(c)(3) | 1977 | $500,405 | 2025-12 | ||
| Lincoln Intermediate Parent Teacher Organization | Education | 501(c)(3) | 2012 | $0 | $0 | 2025-06 |
| Living Vine Church | Religion-related | 501(c)(3) | 2003 | |||
| M C C Health Education | Mental health and crisis intervention | 501(c)(3) | 1991 | $0 | $0 | 2025-12 |
| Margaret Wolf Scholarship Trust | Education | 501(c)(3) | 2001 | $99,561 | 2025-12 | |
| Mason City Church of the Nazarene | 501(c)(3) | 1963 | ||||
| Mason City Community School District 7-12 Pto | Education | 501(c)(3) | 2011 | $0 | $0 | 2022-06 |
| Mason City Country Club Corp | 501(c)(7) | 1994 | 2010-12 | |||
| Mason City Education Association | 501(c)(5) | 1978 | $0 | $0 | 2025-08 | |
| Mason City Farmers Market | Food, agriculture and nutrition | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Mason City Fifth Street Church of Christ | 501(c)(3) | 1982 | ||||
| Mason City Swim Club | 501(c)(3) | 1975 | $0 | $0 | 2025-12 | |
| Mason City Veterans Memorial Association | Arts, culture and humanities | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| Mason City York Rite Corporation | Mutual and membership benefit | 501(c)(10) | 2019 | $0 | $0 | 2025-12 |
| Mason City Youth Football Association | Recreation and sports | 501(c)(3) | 2004 | $0 | $0 | 2025-12 |
| Mc-Newman Post Prom | Arts, culture and humanities | 501(c)(3) | 2026 | $0 | $0 | 2026-06 |
| Messiah Lutheran Church | 501(c)(3) | 1941 | ||||
| Midwest Racing | Recreation and sports | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Mrom | Recreation and sports | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| National Active and Retired Federal Employees Association | 501(c)(5) | 1967 | $0 | $0 | 2025-12 | |
| National Alliance On Mental Illness of North Iowa | Mental health and crisis intervention | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| National Association of Fsa County Office Employees | 501(c)(5) | 1942 | $0 | $0 | 2025-06 | |
| National Association of Letter Carriers Harmony Branch 471 | 501(c)(5) | 1944 | $0 | $0 | 2025-12 | |
| National Exchange Club | 501(c)(4) | 1950 | $0 | $0 | 2025-06 | |
| National Society of the Daughters of the American Revolution | 501(c)(3) | 1969 | $0 | $0 | 2025-12 | |
| Newman Alumni Corporation | 501(c)(4) | 1987 | $0 | $0 | 2025-12 | |
| Newman Catholic School System | 501(c)(3) | 1946 | ||||
| North Central Iowa Genealogical Society | 501(c)(3) | 1983 | $0 | $0 | 2025-12 | |
| North Iowa Basketball Association | Recreation and sports | 501(c)(3) | 2012 | $0 | $0 | 2025-07 |
| North Iowa Builders Exchange | Community improvement and capacity building | 501(c)(6) | 2005 | $0 | $0 | 2023-12 |
| North Iowa Child Abuse Prevention Council Inc | Crime and legal-related | 501(c)(3) | 1997 | $0 | $0 | 2025-12 |
| North Iowa Community Emergency Response Team LLC | Public safety, disaster preparedness and relief | 501(c)(3) | 2014 | $0 | $0 | 2026-06 |
| North Iowa Landlords Association | Community improvement and capacity building | 501(c)(6) | 2019 | $0 | $0 | 2024-06 |
| North Iowa Long Term Disaster Recovery Committee | 501(c)(3) | 2021 | $0 | $0 | 2023-12 | |
| North Iowa Pharmacy Inc | Education | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| North Iowa Touring Club | 501(c)(7) | 1994 | $0 | $0 | 2023-12 | |
| North Iowa Vintage Auto Club | Recreation and sports | 501(c)(4) | 2007 | $0 | $0 | 2025-12 |
| North Iowa Youth Center | Youth development | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Northland Amateur Communications Group | Arts, culture and humanities | 501(c)(3) | 2021 | $0 | $0 | 2023-12 |
| Our Saviours Lutheran Church | 501(c)(3) | 1988 | ||||
| Pink & Teal Warriors | Community improvement and capacity building | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Praise Community Church | Religion-related | 501(c)(3) | 2003 | |||
| Prince of Peace Lutheran Church | 501(c)(3) | 1972 | ||||
| Rhythm Church | 501(c)(3) | 1972 | ||||
| River City House of Prayer | Religion-related | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Riverhawk Wrestling Club | Recreation and sports | 501(c)(3) | 2023 | $0 | $0 | 2025-09 |
| Rolling Acres Christian Reformed Church | 501(c)(3) | 1975 | ||||
| Roosevelt Elementary School Parent Teacher Organization | Education | 501(c)(3) | 2012 | $0 | $0 | 2026-06 |
| Rotary International | 501(c)(4) | 1942 | $0 | $0 | 2025-06 | |
| Royal and Select Masters of Iowa | 501(c)(8) | 1972 | $0 | $0 | 2024-12 | |
| Rudd Community Betterment Corporation | Recreation and sports | 501(c)(3) | 1992 | $0 | $0 | 2025-12 |
| Sbrlfe | Mental health and crisis intervention | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Simon Says Shoes | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Spirit of the Dove | 501(c)(3) | 1983 | ||||
| St James Evangelical Lutheran Church | 501(c)(3) | 1988 | ||||
| Stockman House Museum Foundation | Arts, culture and humanities | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Stomping Out Childhood Cancer | Diseases, disorders and medical disciplines | 501(c)(3) | 2019 | $0 | $0 | 2023-12 |
| Strand North Central Foundation | Education | 501(c)(3) | 2009 | $1.2 million | 2025-12 | |
| Stratford Foundation Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1996 | $293,154 | 2025-12 | |
| Stuart D Nevermann Charitable Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $648,267 | 2025-12 | |
| Tall Corn Dental Symposium | Education | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| The Christian Fellowship | Religion-related | 501(c)(3) | 1995 | |||
| The House Ia | Housing and shelter | 501(c)(3) | 2026 | |||
| Thomas S Kemp Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1997 | $4.7 million | 2025-12 | |
| Toastmasters International | 501(c)(3) | 1945 | $0 | $0 | 2025-12 | |
| Toastmasters International | 501(c)(3) | 1945 | $0 | $0 | 2025-12 | |
| Tomson Fam Foundation Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2014 | $12.5 million | 2025-12 | |
| Upper Room Ministries | 501(c)(3) | 1970 | ||||
| Veterans of Foreign Wars of the United States Dept of Iowa | 501(c)(19) | 1951 | $0 | $0 | 2025-12 | |
| Vietnam Veterans of America Inc | 501(c)(19) | 1984 | $0 | $0 | 2026-02 | |
| Wesleyan Church Corp | 501(c)(3) | 1970 | ||||
| North Iowa Corridor Housing Development Corporation | 501(c)(3) | 2025 | $-61,173 | $563,524 | 2025-06 |
By cause in Mason City, IA
- Education 17
- Philanthropy, voluntarism and grantmaking foundations 15
- Recreation and sports 14
- Arts, culture and humanities 12
- Community improvement and capacity building 10
- Human services 10
- Religion-related 8
- Health care 7
- Youth development 6
- Housing and shelter 5
- Mental health and crisis intervention 5
- Public and societal benefit 4
- Food, agriculture and nutrition 4
- Public safety, disaster preparedness and relief 3
- Diseases, disorders and medical disciplines 3
Nonprofits in every city of the state
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.