| California Baptist University | 501(c)(3) | 1969 | $482.7 million | $762.6 million | 2025-06 |
| La Sierra University | 501(c)(3) | 1947 | $72.1 million | $205.7 million | 2025-06 |
| U C Riverside Foundation | 501(c)(3) | 1975 | $20.9 million | $323.8 million | 2025-06 |
| Woodcrest Christian School System | 501(c)(3) | 2016 | $14.3 million | $10 million | 2025-07 |
| Reach Leadership Academy | 501(c)(3) | 2012 | $12.4 million | $5 million | 2025-06 |
| Riverside Gateway To College Early College High School Echs | 501(c)(3) | 2005 | $6.2 million | $4 million | 2025-06 |
| Concilio Child Development Centers | 501(c)(3) | 1982 | $2.4 million | $818,476 | 2025-06 |
| Associated Students University of California Riverside | 501(c)(3) | 1961 | $1.2 million | $2.3 million | 2025-06 |
| University of California Riverside Alumni Association | 501(c)(3) | 1977 | $1 million | $5.9 million | 2025-06 |
| Islamic Academy of Riverside | 501(c)(3) | 2013 | $931,753 | $627,491 | 2025-07 |
| Youre Invited Childrens Center | 501(c)(3) | 2014 | $631,979 | $234,556 | 2025-12 |
| Altura Foundation | 501(c)(3) | 1995 | $603,472 | $6.9 million | 2024-12 |
| Saint Andrew Orthodox Christian Education Center Inc | 501(c)(3) | 2022 | $513,872 | $79,898 | 2024-12 |
| Friends of Arocha | 501(c)(3) | 2017 | $400,000 | $743,610 | 2024-12 |
| Riverside Public Library Foundation | 501(c)(3) | 1999 | $393,422 | $1.1 million | 2024-12 |
| Masonry Industry Training Assoc | 501(c)(3) | 1998 | $341,253 | $920,500 | 2025-12 |
| Riverside Educational Enrichment Foundation | 501(c)(3) | 1993 | $262,334 | $892,665 | 2026-06 |
| Riverside Unified School District Foundation | 501(c)(3) | 2021 | $193,025 | $240,378 | 2025-06 |
| Empower You Edutainment | 501(c)(3) | 2017 | $191,456 | $238,739 | 2024-12 |
| Wolfpack Football Booster Club | 501(c)(3) | 2011 | $175,654 | $78,988 | 2025-12 |
| My Learning Studio Outreach | 501(c)(3) | 2013 | $162,561 | $11,205 | 2025-12 |
| Entrepreneurs Organization | 501(c)(3) | 1992 | $159,185 | $156,654 | 2024-06 |
| Poly-Band Boosters Corp | 501(c)(3) | 2019 | $117,539 | $64,287 | 2025-06 |
| The Inland Ivy Foundation | 501(c)(3) | 2012 | $110,033 | $79,852 | 2025-12 |
| Blue Star Regiment Instrumental Music Association | 501(c)(3) | 1980 | $94,290 | $7,528 | 2025-06 |
| MLK Band Boosters | 501(c)(3) | 2010 | $88,588 | $11,762 | 2025-06 |
| California Independent Provider Training Center | 501(c)(3) | 2012 | $85,575 | $321,867 | 2024-12 |
| Lake Hills Elementary Pto | 501(c)(3) | 2012 | $76,451 | $47,720 | 2025-06 |
| Martin Luther King High School Cross Country-Track Booster Club | 501(c)(3) | 2008 | $74,439 | $18,753 | 2026-06 |
| Riverside County Office of Education Foundation | 501(c)(3) | 2013 | $73,129 | $194,775 | 2025-06 |
| Institute for Promotion of Vediceducation and Culture Inc | 501(c)(3) | 2007 | $70,004 | $32,819 | 2025-12 |
| Riverside Uptown Kiwanis Charities Inc | 501(c)(3) | 2007 | $54,180 | $148,541 | 2025-09 |
| Jurupa Valley Adopt A Family | 501(c)(3) | 2012 | $53,760 | $15,489 | 2023-12 |
| Benjamin Franklin Elementary School Parent Teacher Organization Inc | 501(c)(3) | 2004 | $48,603 | $104,873 | 2025-06 |
| Arlington Golden Pride Band Booster | 501(c)(3) | 1999 | $47,719 | $13,771 | 2025-06 |
| Korean Catholic Renewal Movement of Southern California | 501(c)(3) | 1946 | $46,812 | $66,677 | 2025-12 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $44,792 | $25,984 | 2025-12 |
| Hillcrest Baseball Boosters | 501(c)(3) | 2023 | $39,748 | $3,612 | 2024-12 |
| Peking University Alumni Association of Southern California | 501(c)(3) | 2003 | $21,384 | $142,235 | 2024-12 |
| Riverside County Training Officers | 501(c)(3) | 2022 | $19,087 | $26,737 | 2024-12 |
| America Caritas University | 501(c)(3) | 2018 | $13,100 | $1 | 2024-12 |
| American College of Spine Surgery Inc | 501(c)(3) | 2000 | $12,890 | $175,067 | 2024-12 |
| West Coast Thunder | 501(c)(3) | 2013 | $9,859 | $59,982 | 2025-12 |
| Friends of the Woodcrest Community Library | 501(c)(3) | 2003 | $8,623 | $24,041 | 2025-12 |
| Lincoln Foundation of Riverside County | 501(c)(3) | 2019 | $3,625 | $506 | 2024-12 |
| Nakae Foundation for Access and Equity in Medical Education and He | 501(c)(3) | 2023 | $216 | $1,444 | 2025-12 |
| 10 8 Ministries | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| 3 Cord Ministries | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Agama Foundation | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Alcott School Foundation | 501(c)(3) | 2016 | $0 | $0 | 2025-06 |
| Arizona MS Pto | 501(c)(3) | 2026 | | | |
| Bears Pep Squad Boosters | 501(c)(3) | 2026 | | $23,831 | 2026-06 |
| Briggs Softball Inc | 501(c)(3) | 2021 | | $1 | 2024-12 |
| Brockman Institute | 501(c)(3) | 1979 | $0 | $0 | 2025-12 |
| Brotherly Love | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Bryant Elementary Pto | 501(c)(3) | 2015 | $0 | $0 | 2026-06 |
| CCS Education and Wellness Center | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| California Community College Athletic Trainers Association Inc | 501(c)(3) | 2020 | $0 | $0 | 2025-06 |
| California Twirling Coaches and Judges Association | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| California University Preparatory Academy | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Caselli Foundation Trust | 501(c)(3) | 2019 | | $3.1 million | 2024-12 |
| Center of Unlimited Potential | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Chinese Students and Scholars Association at Ucr | 501(c)(3) | 2025 | | | |
| Chinese-American Faculty Association Scholarship Foundation | 501(c)(3) | 1996 | $0 | $0 | 2024-12 |
| Chip Chuckers of Riverside | 501(c)(4) | 2001 | $0 | $0 | 2025-12 |
| Computer Science Youth of America | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Dier Aora Education and Development Initiative | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Eaa Chapter 1712 | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Equitech Innovation | 501(c)(3) | 2024 | | | |
| Excelencia Latina | 501(c)(3) | 2024 | $0 | $0 | 2024-06 |
| Explore Stem Foundation | 501(c)(3) | 2024 | $0 | $0 | 2025-07 |
| For Sonia-S Sake | 501(c)(3) | 2026 | | | |
| GLG Science Education and Community Services Association | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Global Roots Academy | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Hillcrest High School Pto | 501(c)(3) | 2022 | $0 | $0 | 2025-06 |
| Hillcrest High School Volleyball Boosters | 501(c)(3) | 2022 | $0 | $0 | 2025-07 |
| Homefield Collective | 501(c)(3) | 2025 | | | |
| Homeless 2 Hopeful Housing | 501(c)(3) | 2025 | | | |
| I E Stallions | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Ian T Littlefield Yu Yu Inc | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Iar Pto | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| Jack H Brown Family Foundation | 501(c)(3) | 2017 | | $51.5 million | 2025-12 |
| Kappa Alpha Psi Fraternity | 501(c)(7) | 2022 | $0 | $0 | 2024-12 |
| King HS Boys Water Polo Booster Club Inc | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| La Granada Pto | 501(c)(3) | 2025 | | | |
| La Sierra Cheer Booster Club | 501(c)(3) | 2018 | $0 | $0 | 2023-05 |
| Lady Bears Flag Football Boosters | 501(c)(3) | 2025 | $0 | $0 | 2026-06 |
| Legacy of Valor & Excellence | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| M Y Skipper Education Enterprises Life Foundation | 501(c)(3) | 2023 | $0 | $0 | 2024-01 |
| MLKHS Ladies Lacrosse Booster | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Mas Fuerte Scholarship Inc | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Michaela Zickuhr Memorial Scholarship Fund | 501(c)(3) | 2010 | $0 | $0 | 2024-12 |
| Minority Community Alliance | 501(c)(3) | 2021 | $0 | $0 | 2024-12 |
| Mission Mit International Education Foundation | 501(c)(3) | 2026 | | | |
| Needy Child International | 501(c)(3) | 2001 | $0 | $0 | 2025-12 |
| Nkyinkyim Inc | 501(c)(3) | 2024 | $0 | $0 | 2023-12 |
| Norte Vista Pto | 501(c)(3) | 2024 | $0 | $0 | 2025-05 |
| Orrenmaa Elementary School Parent Teacher Organization | 501(c)(3) | 2025 | $0 | $0 | 2026-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-07 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-08 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-03 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-08 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-07 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2025-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2023-06 |
| Parent Booster USA Inc | 501(c)(3) | 2005 | $0 | $0 | 2026-06 |
| Patriot High School Cheer Booster Club Inc | 501(c)(3) | 2025 | | | |
| Peaceinthestreetsmovement Foundation Org | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Premier Womens Council | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Queen Work Inc | 501(c)(3) | 2023 | $0 | $0 | 2025-06 |
| Reach Public School - Georgia Inc | 501(c)(3) | 2026 | | | |
| Red Blue and White | 501(c)(3) | 2025 | $0 | $0 | 2025-05 |
| Reflective Foundations Inc | 501(c)(3) | 2024 | | $1 | 2025-12 |
| Residents Association of Greater Lake Mathews | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Riverside County Fire Explorer Advisory Committee | 501(c)(3) | 2005 | $0 | $3,443 | 2023-12 |
| Riverside County Library System Foundation | 501(c)(3) | 2018 | $0 | $0 | 2026-06 |
| Riverside East Rotary Foundation Inc | 501(c)(3) | 2001 | $0 | $0 | 2025-06 |
| Riverside Heartsavers | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Riverside Huskies Baseball Club | 501(c)(3) | 2019 | $0 | $0 | 2024-07 |
| Riverside Stem Academy Foundation | 501(c)(3) | 2016 | $0 | $0 | 2024-06 |
| Riverside Unified School District Special Education Booster Club | 501(c)(3) | 2014 | $0 | $0 | 2026-05 |
| Roar Call for Regalia | 501(c)(3) | 2025 | | | |
| Robert J Loney Scholarship Fund | 501(c)(3) | 2001 | $0 | $0 | 2024-12 |
| Royal Rangers National Shooting Sports Program | 501(c)(3) | 2024 | $0 | $0 | 2024-12 |
| SB Bolivar Foundation | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Safe Haven & Care | 501(c)(3) | 2016 | $0 | $0 | 2025-06 |
| Science Math and Robotic Technology Education | 501(c)(3) | 2010 | $0 | $0 | 2024-12 |
| Scout the Shelves | 501(c)(3) | 2026 | | | |
| Seely Foundation | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Sheik Temple 98 | 501(c)(8) | 2026 | $0 | $0 | 2026-07 |
| Shri Vishnu Spiritual Ashram | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Sigma Theta Tau International Inc | 501(c)(3) | 1954 | $0 | $0 | 2025-06 |
| Sojourner Truth Fund | 501(c)(3) | 2020 | $0 | $0 | 2024-06 |
| Speechling Education Corporation | 501(c)(3) | 2016 | | $397,614 | 2026-05 |
| Stars for A Better Tomorrow Inc | 501(c)(3) | 2015 | $0 | $0 | 2024-12 |
| Stephen and Lyda Beluso Foundation | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Stokoe | 501(c)(3) | 2025 | $0 | $0 | 2026-06 |
| Success 4 Entrepreneurs Inc | 501(c)(3) | 2007 | | | |
| Sunshine School Parent Group | 501(c)(3) | 2012 | $0 | $0 | 2023-06 |
| Taikomix | 501(c)(3) | 2009 | $0 | $0 | 2026-06 |
| The Best Version of You Academy | 501(c)(3) | 2025 | | | |
| The Matrix University | 501(c)(3) | 2023 | $0 | $0 | 2025-04 |
| Tornados Pto | 501(c)(3) | 2025 | | | |
| Triquetra Communications Inc | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Trojans Golf Booster | 501(c)(3) | 2025 | $0 | $0 | 2026-06 |
| University Stem Academy | 501(c)(3) | 2015 | $0 | $0 | 2025-06 |
| Uplift Legacy Foundation | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Valley View Elementary Pto | 501(c)(3) | 2022 | $0 | $0 | 2025-06 |
| Villegas Middle School Pto | 501(c)(3) | 2017 | $0 | $0 | 2025-06 |
| Vocational Rehabilitation Services Inc | 501(c)(3) | 2024 | $0 | $0 | 2026-05 |
| We Are Stem Success Inc | 501(c)(3) | 2025 | $0 | $1 | 2024-12 |
| Wells Middle School Pto | 501(c)(3) | 2025 | | | |
| Western Education | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Western Institute for Endangered Language Documentation | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Wingate Foundation | 501(c)(3) | 1999 | | $8.2 million | 2025-12 |
| Riverside County Education Foundation | 501(c)(3) | 2001 | $-98,859 | $2.1 million | 2025-06 |