Data / Nonprofits / Wisconsin / Mequon
Nonprofits in Mequon, WI: 212 registered with the IRS
212 nonprofits are registered with the IRS in Mequon, WI, 189 of them 501(c)(3) charities; the 72 that report revenue took in $220.7 million. The largest by revenue: Concordia University Inc ($166.3 million), North Shore Country Club ($9.3 million), Crown Court Properties LTD ($8 million). Most common causes: philanthropy, voluntarism and grantmaking foundations (30), education (26), 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 |
|---|---|---|---|---|---|---|
| Concordia University Inc | Education | 501(c)(3) | 1941 | $166.3 million | $198.7 million | 2025-06 |
| North Shore Country Club | Recreation and sports | 501(c)(7) | 1945 | $9.3 million | $19.1 million | 2025-12 |
| Crown Court Properties LTD | Housing and shelter | 501(c)(3) | 2000 | $8 million | $32 million | 2024-12 |
| Ozaukee Country Club | Recreation and sports | 501(c)(7) | 1938 | $5.6 million | $11.6 million | 2025-12 |
| Concordia University Wisconsin Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2020 | $5.1 million | $157.7 million | 2025-06 |
| Snow and Ice Management Association Inc | 501(c)(6) | 1997 | $3.5 million | $3.1 million | 2024-12 | |
| Ozaukee Day Care Center Inc | 501(c)(3) | 1977 | $2.9 million | $3.5 million | 2026-06 | |
| Thiensville-Mequon Rotary Foundation Inc | 501(c)(3) | 1989 | $2.6 million | $2.6 million | 2026-01 | |
| Wisconsin Amateur Hockey Association Inc | Recreation and sports | 501(c)(3) | 2000 | $2.3 million | $1.2 million | 2025-06 |
| Ozaukee Youth Hockey Association Inc | Recreation and sports | 501(c)(3) | 2005 | $1.7 million | $5.9 million | 2025-04 |
| Jim Luther New Hope Center Inc | Human services | 501(c)(3) | 2021 | $1.4 million | $436,434 | 2025-09 |
| Mequon Jewish Preschool Inc | Education | 501(c)(3) | 1999 | $897,844 | $663,658 | 2025-06 |
| Mequon Nature Preserve Inc | Environment | 501(c)(3) | 2011 | $888,997 | $2 million | 2024-12 |
| New World Montessori School LTD | Education | 501(c)(3) | 2013 | $870,991 | $1.4 million | 2025-07 |
| Blue Coats Foundation Inc | 501(c)(3) | 1966 | $724,218 | $1.8 million | 2025-04 | |
| Reflejo Inc | Religion-related | 501(c)(3) | 2023 | $640,708 | $259,015 | 2025-12 |
| The Charles E Kubly Foundation Inc | Mental health and crisis intervention | 501(c)(3) | 2004 | $463,491 | $1.7 million | 2026-02 |
| Missionary Fraternity of Mary LTD | 501(c)(3) | 1991 | $452,844 | $2.4 million | 2024-12 | |
| H O L I E of West Allis Inc | 501(c)(3) | 1991 | $401,041 | $627,223 | 2025-06 | |
| H O L I E of Greenfield Inc | Education | 501(c)(3) | 2001 | $380,689 | $1.5 million | 2025-06 |
| Holie III Inc | Housing and shelter | 501(c)(3) | 1995 | $377,939 | $556,607 | 2025-04 |
| Thiensville Mequon Youth Baseball Association | 501(c)(3) | 2005 | $358,670 | $245,248 | 2025-12 | |
| Mequon-Thiensville Community Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1999 | $321,861 | $796,643 | 2024-12 |
| Holie VII Inc | Housing and shelter | 501(c)(3) | 2006 | $305,581 | $1.8 million | 2025-04 |
| Village Mke | Education | 501(c)(3) | 2023 | $291,000 | $76,507 | 2023-12 |
| Northshore Classical Academy LTD | Education | 501(c)(3) | 2022 | $260,080 | $800,416 | 2025-06 |
| Be the Difference Nil Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $239,318 | $9,223 | 2025-12 |
| Wisconsin Council On Economic Education Inc | Social science | 501(c)(3) | 1964 | $224,428 | $255,850 | 2024-12 |
| H O L I E of Cudahy Inc | Housing and shelter | 501(c)(3) | 1998 | $222,099 | $494,938 | 2025-06 |
| Mequon-Thiensville Education Foundation Inc | Education | 501(c)(3) | 1999 | $204,127 | $1.4 million | 2025-06 |
| H O L I E of Waukesha Inc | Housing and shelter | 501(c)(3) | 1996 | $194,313 | $345,918 | 2025-04 |
| Society of St Francis | Animal-related | 501(c)(3) | 1985 | $189,982 | $380,631 | 2024-12 |
| Mequon Theinsville Area Chamber of Commerce and Industry Inc | 501(c)(6) | 1985 | $172,385 | $65,201 | 2025-12 | |
| Mequon Softball Academy Inc | Recreation and sports | 501(c)(3) | 2024 | $167,618 | $38,586 | 2025-12 |
| Wisconsin Academy of Family Physicians Foundation Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 1983 | $163,627 | $707,139 | 2025-12 |
| Cuventures Inc | Education | 501(c)(3) | 2020 | $162,258 | $1.6 million | 2024-06 |
| Milwaukee Women Inc | Education | 501(c)(3) | 2010 | $159,436 | $266,883 | 2025-12 |
| Maryland Academy of Family Physicians Foundation | Health care | 501(c)(3) | 1989 | $135,724 | $162,180 | 2025-12 |
| The Weyenberg Public Library Foundation Inc | 501(c)(3) | 1983 | $125,466 | $3.2 million | 2025-12 | |
| Friends of Jonathan Clark House LTD | Arts, culture and humanities | 501(c)(3) | 2013 | $123,496 | $524,907 | 2025-12 |
| Wisconsin Scholastic Chess Federation | Recreation and sports | 501(c)(3) | 2004 | $118,995 | $7,351 | 2025-06 |
| Women of Christ Inc | Religion-related | 501(c)(3) | 2009 | $118,473 | $146,946 | 2025-02 |
| Wisconsin Junior Classical League Inc | 501(c)(3) | 1987 | $108,043 | $137,030 | 2025-12 | |
| Milwaukee Riverwalk District Inc | Community improvement and capacity building | 501(c)(3) | 1993 | $101,710 | $140,784 | 2024-12 |
| Concerned Actuaries Group Inc | Education | 501(c)(3) | 2018 | $96,200 | $81,709 | 2025-12 |
| Reorient Mentoring | Human services | 501(c)(3) | 2020 | $95,284 | $27,777 | 2024-12 |
| Rise and Shine | Arts, culture and humanities | 501(c)(3) | 2025 | $94,090 | $6,559 | 2025-12 |
| Serra International | 501(c)(3) | 1949 | $84,883 | $194,904 | 2025-12 | |
| Trinity Lutheran Church - Historical Society | Arts, culture and humanities | 501(c)(3) | 2020 | $84,843 | $190,641 | 2025-12 |
| What Everett Takes Foundation | Human services | 501(c)(3) | 2021 | $76,677 | $31,415 | 2024-12 |
| M-T Cardinals Youth Football Inc | Recreation and sports | 501(c)(3) | 2015 | $74,862 | $67,696 | 2025-12 |
| Friends of Be An Angel Inc | International, foreign affairs and national security | 501(c)(3) | 2022 | $73,150 | $98,887 | 2025-12 |
| Community Fun Events Inc | 501(c)(4) | 1989 | $73,088 | $53,090 | 2025-12 | |
| Wi Chapter Steel Service Center Institute Inc | 501(c)(6) | 1998 | $70,561 | $64,100 | 2025-12 | |
| Golden Opportunities Partnerships Inc | Religion-related | 501(c)(3) | 2021 | $70,207 | $101,630 | 2025-12 |
| Green Tree Garden Club Inc | Environment | 501(c)(3) | 2001 | $69,820 | $211,907 | 2026-06 |
| Mequon-Theinsville Area Council Parent Teacher Organization | Education | 501(c)(3) | 2006 | $66,260 | $13,449 | 2025-06 |
| Clan Beglan Inc | Arts, culture and humanities | 501(c)(3) | 2010 | $62,582 | $31,061 | 2025-08 |
| Highlander Basketball Club Inc | Youth development | 501(c)(3) | 2006 | $55,630 | $48,539 | 2025-12 |
| Sima Foundation | Education | 501(c)(3) | 2020 | $51,643 | $217,419 | 2024-12 |
| Epilepsy Families Southeast Wisconsin Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 1967 | $47,708 | $194,674 | 2024-12 |
| West Point Parents Association of Wisconsin Inc | 501(c)(3) | 1988 | $38,561 | $65,268 | 2025-12 | |
| Mequon-Theinsville Area Council Parent Teacher Organization | Education | 501(c)(3) | 2006 | $34,519 | $26,759 | 2025-06 |
| National Council of Jewish Women Incorporated | Community improvement and capacity building | 501(c)(3) | 1945 | $28,503 | $116,237 | 2025-06 |
| Freistadt Heritage Foundation Inc | Arts, culture and humanities | 501(c)(3) | 2014 | $25,749 | $78,261 | 2025-12 |
| Mequon-Theinsville Area Council Parent Teacher Organization | Education | 501(c)(3) | 2006 | $22,114 | $17,103 | 2025-06 |
| Professional Emergency Services Inc | Health care | 501(c)(3) | 1974 | $20,920 | $497,111 | 2025-12 |
| 75 Million Patriots | Education | 501(c)(3) | 2024 | $1,000 | $833 | 2024-12 |
| Lisa Levenstein Foundation | Animal-related | 501(c)(3) | 2003 | $130 | $652,493 | 2025-12 |
| A Little Something A Lot of Love | Human services | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Ab Nicholas Scholarship Foundation | Education | 501(c)(3) | 2012 | $56.9 million | 2025-09 | |
| Alliance Bible Church Inc | 501(c)(3) | 1972 | 2010-12 | |||
| American College of Nurse-Midwives | Community improvement and capacity building | 501(c)(6) | 2022 | $0 | $0 | 2025-12 |
| American Legion | 501(c)(19) | 1946 | $0 | $0 | 2026-06 | |
| American Legion | 501(c)(19) | 1946 | $0 | $0 | 2024-12 | |
| Anini USA Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Auxano Inc | 501(c)(3) | 1977 | ||||
| Beautiful Savior Lutheran Church | 501(c)(3) | 1941 | 2013-12 | |||
| Beit Shammai Inc | Education | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Best Family 37TH Street Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2023 | $527,055 | 2025-12 | |
| Break the Ice Corporation | Youth development | 501(c)(3) | 2026 | |||
| Brew City Cruise Night Inc | Recreation and sports | 501(c)(7) | 2021 | $0 | $0 | 2025-12 |
| Building Blocks Christian Learning Center | Religion-related | 501(c)(3) | 1966 | |||
| Byers Foundation LTD | 501(c)(3) | 1993 | $833,194 | 2025-12 | ||
| Cameron Kranich Choose Kindness Foundation Corporation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2020 | $0 | $0 | 2025-01 |
| Care Foundation | International, foreign affairs and national security | 501(c)(3) | 2025 | $0 | $0 | 2025-01 |
| Center for Jewish Life Inc | Religion-related | 501(c)(3) | 2012 | |||
| Charles and Marcia Larsen & Anthony and Priscilla Beadell Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2013 | $2 million | 2024-12 | |
| Charleston Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $2.5 million | 2025-12 | |
| Christ Church | Religion-related | 501(c)(3) | 2001 | |||
| Congregation Agudas Achim Chabad Inc | 501(c)(3) | 1993 | ||||
| Cudahy Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $16 million | 2025-12 | |
| DCWM Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Dean Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $340,967 | 2025-12 | |
| Diane M Hendricks Foundation Trust | Community improvement and capacity building | 501(c)(3) | 2019 | $8,683 | 2024-12 | |
| Don Karisny Memorial Inc | Education | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Eidsvollsmen Council of North America | International, foreign affairs and national security | 501(c)(3) | 2010 | $0 | $0 | 2023-12 |
| Enlight Health Foundation | Health care | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Every Day Good Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2015 | $6.5 million | 2025-12 | |
| Evsafe | Public safety, disaster preparedness and relief | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Frank & Emily Moscoto Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2012 | $4,442 | 2024-12 | |
| Friends of Rennicke Foundation | Recreation and sports | 501(c)(3) | 2024 | |||
| Friends of the Weyenberg Library | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Gebhardt Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2001 | $1.3 million | 2025-12 | |
| Giveakidabike Inc | Human services | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Globall Giving | International, foreign affairs and national security | 501(c)(3) | 2012 | $0 | $0 | 2024-12 |
| Graceful Wakes Inc | Recreation and sports | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Great Lakes GB Association Inc | Recreation and sports | 501(c)(7) | 2023 | $0 | $0 | 2025-10 |
| Green Acres Boxer Rescue of Wisconsin Inc | Animal-related | 501(c)(3) | 2001 | $0 | $0 | 2024-12 |
| HHS Blue Line Club Inc | Education | 501(c)(3) | 1997 | $0 | $0 | 2026-06 |
| Harvard Club of Wisconsin | 501(c)(3) | 1978 | $0 | $0 | 2026-02 | |
| Heal Uganda Inc | International, foreign affairs and national security | 501(c)(3) | 2012 | $93,707 | 2025-12 | |
| Help Ukrainian Hospitals Inc | International, foreign affairs and national security | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Henry H Uihlein and Marion S Uihlein Foundation Inc | 501(c)(3) | 1954 | $2.2 million | 2025-10 | ||
| Hickory Lane Explorers Inc | Environment | 501(c)(3) | 2026 | |||
| Homestead HS Band Parents Association | Arts, culture and humanities | 501(c)(3) | 2023 | $0 | $0 | 2025-06 |
| Homestead High School Parent Teacher Student Organization | Education | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Homeward Bound Animal Rescue of Wisconsin Inc | Animal-related | 501(c)(3) | 2024 | |||
| Hope Straps Inc | Health care | 501(c)(3) | 2024 | $0 | $0 | 2026-03 |
| Howard Frankenthal Family Foundation LTD | 501(c)(3) | 1989 | $916,939 | 2026-04 | ||
| International Association of Eating Disorders Professional Foundation | Mental health and crisis intervention | 501(c)(6) | 2013 | $0 | $0 | 2025-12 |
| International Institute for Global Leadership Inc | International, foreign affairs and national security | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Ja-Sa Schneck Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2001 | $66,706 | 2025-12 | |
| Jain Religious Center of Wisconsin Inc | Religion-related | 501(c)(3) | 2000 | |||
| James Wheeler Campbell Memorial Foundation Inc | 501(c)(3) | 1993 | $2.1 million | 2025-12 | ||
| Jewish War Veterans of the United States of America Inc | 501(c)(4) | $0 | $0 | 2025-12 | ||
| John H & Kathleen H Schneider Fam Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $547,244 | 2025-12 | |
| Just Listen Inc | Mental health and crisis intervention | 501(c)(3) | 2018 | $0 | $0 | 2025-10 |
| Kappa Psi Pharmaceutical Fraternity | 501(c)(7) | 1964 | $0 | $0 | 2025-12 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-12 | |
| Krause Family Foundation Inc | 501(c)(3) | 1954 | $5.1 million | 2025-12 | ||
| Ladies of Bluegrass Corporation | Human services | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Ladky Associates Foundation Inc | 501(c)(3) | 1964 | $129,886 | 2025-12 | ||
| Langford Moreau Society Inc | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Lori and David Nicholas Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2021 | $52.4 million | 2025-12 | |
| Lynn S Nicholas Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $48.8 million | 2025-12 | |
| MTSD Choral Parent Association Inc | Education | 501(c)(3) | 2020 | $0 | $0 | 2026-06 |
| MTSD Orchestra Parents Inc | 501(c)(3) | 1985 | $0 | $0 | 2026-06 | |
| Margaret Rose Misey Trust | 501(c)(92) | |||||
| Matrix Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2000 | $990,659 | 2025-12 | |
| Max Fund Inc | 501(c)(3) | 1994 | $542,789 | 2025-12 | ||
| Meca Wisconsin Police Canine Vest Foundation Inc | Human services | 501(c)(3) | 2014 | $280,444 | 2025-12 | |
| Media Ambassadors Mke Inc | Public and societal benefit | 501(c)(3) | 2026 | |||
| Mequon Eruv Inc | Religion-related | 501(c)(3) | 1996 | $0 | $0 | 2025-12 |
| Mequon Fire & Ems Association | Employment | 501(c)(5) | 2009 | $0 | $0 | 2024-12 |
| Mequon Outreach Center Inc | Religion-related | 501(c)(3) | 2003 | |||
| Mequon Thiensville Area Council Parent Teacher Organization Inc | Education | 501(c)(3) | 2006 | $0 | $0 | 2025-06 |
| Mequon-Theinsville Area Council Parent Teacher Organization | Education | 501(c)(3) | 2006 | $0 | $0 | 2025-06 |
| Mequon-Theinsville Area Council Parent Teacher Organization | Education | 501(c)(3) | 2006 | $0 | $0 | 2025-06 |
| Mikvah Mei Menachem Inc | Religion-related | 501(c)(3) | 2004 | |||
| Milwaukee Area Messiah Community Chorus and Orchestra Inc | Arts, culture and humanities | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Milwaukee Hmong Catholic Community | Religion-related | 501(c)(3) | 2018 | $0 | $0 | 2023-12 |
| Misey Pfeffer Trust | 501(c)(92) | $1.9 million | 2025-12 | |||
| Mitchell Street Development Opportunities Corporation | Human services | 501(c)(3) | 1993 | $0 | $0 | 2024-12 |
| Mt Trails Foundation Inc | Recreation and sports | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Muller Fasching Verein Nordamerika Inc | Arts, culture and humanities | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| National Council for Geocosmic Research Inc | Social science | 501(c)(3) | 2009 | $0 | $0 | 2026-06 |
| National Society of the Children of the American Revolution | Youth development | 501(c)(3) | 1973 | $0 | $0 | 2026-02 |
| Nesh Eim Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2003 | $250,760 | 2025-12 | |
| Nicholas Fam Foundation Trust | 501(c)(3) | 1994 | $51.7 million | 2025-12 | ||
| North Shore Beekeepers Association Inc | Education | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| On A Shoestring Inc | Human services | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Paramount Services Inc | Human services | 501(c)(3) | 2024 | |||
| Paul F and Lois K Heiss Family Foundation Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 1999 | $148,640 | 2025-12 | |
| Pearson Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2011 | $2 million | 2025-12 | |
| Pelz Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1996 | $832,240 | 2025-12 | |
| Perkins Wildlife Area Inc | Environment | 501(c)(3) | 2024 | $133,692 | 2025-12 | |
| Philip Rubenstein Foundation Inc | 501(c)(3) | 1978 | $1.8 million | 2026-01 | ||
| Pivotal Directions Inc | Public and societal benefit | 501(c)(3) | 2022 | $0 | $0 | 2023-12 |
| Pommersche Tanzdeel Freistadt Inc | Arts, culture and humanities | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Post Healthy LLC | Human services | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Psi Chi the National Honor Society in Psychology | 501(c)(3) | 1957 | $0 | $0 | 2025-06 | |
| Rickey and Patty Kanter Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2015 | $389,405 | 2025-12 | |
| Rileys Room | Housing and shelter | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Rise 2020 | Community improvement and capacity building | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Sigma Theta Tau International Inc | 501(c)(3) | 1954 | $0 | $0 | 2026-06 | |
| Smocking Arts Guild of America Inc | 501(c)(3) | 1981 | $0 | $0 | 2025-12 | |
| Societa Santa Rosalia Di S S Q Inc | Religion-related | 501(c)(3) | 2006 | $0 | $0 | 2025-08 |
| Southern Wisconsin Country Dance Society Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Spiritual Rock Christian Education Inc | Religion-related | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Split Rail Foundation Inc | 501(c)(3) | 1986 | $279,024 | 2024-12 | ||
| St John Lutheran Church | 501(c)(3) | 1966 | ||||
| Steven P and Josephine A Kraninger Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2021 | $296,784 | 2025-12 | |
| Stollenwerk Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2013 | $964,542 | 2025-12 | |
| Teavy Nautical Corp | Youth development | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| The Animal Lobby Inc | Education | 501(c)(3) | 1995 | $0 | $0 | 2025-12 |
| The Center for Applied Theatre | Arts, culture and humanities | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| The New Day Club Inc | 501(c)(3) | 1985 | $0 | $0 | 2025-12 | |
| The Other Stratton Foundation Inc | 501(c)(3) | 1994 | $49,950 | 2025-06 | ||
| Timothy and Nancy Speaker Family Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2024 | $7.5 million | 2024-12 | |
| Toc-Wi | Public and societal benefit | 501(c)(3) | 2022 | $0 | $0 | 2025-04 |
| Trail Youth Foundation | Youth development | 501(c)(3) | 2026 | |||
| Transplant Professionals of Indian Origin | Health care | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Trinity Lutheran Church | 501(c)(3) | 1941 | 2012-12 | |||
| Twin Oaks Homeowners Association Inc | Housing and shelter | 501(c)(4) | 2005 | $0 | $0 | 2024-12 |
| Underwood Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2021 | $2.6 million | 2024-12 | |
| United Steelworkers | 501(c)(5) | 1940 | $0 | $0 | 2025-12 | |
| Vessels of Honour Church Inc | 501(c)(3) | 1985 | ||||
| Voice of Archangel Inc | Mental health and crisis intervention | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| W T Hansen Family Foundation Inc | 501(c)(3) | 1957 | $78,190 | 2025-08 | ||
| Wandas House Inc | Housing and shelter | 501(c)(3) | 2024 | $0 | $0 | 2023-12 |
| Warriors Way Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| William & Sandy Heitz Family Found | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1995 | $2.4 million | 2025-12 | |
| William N and Janice V Godfrey Family Foundation Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2012 | $5.3 million | 2025-12 | |
| Willow Brook Haven Inc | Animal-related | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
| Wisconsin Blues Music Hall of Fame Inc | Arts, culture and humanities | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Wisconsin Iris Society | Environment | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Wisconsin Society of Interventional Pain Physicians Inc | Community improvement and capacity building | 501(c)(6) | 2003 | $0 | $24,711 | 2025-12 |
| Zink the Zebra Foundation Inc of Milwaukee | Diseases, disorders and medical disciplines | 501(c)(3) | 1995 | $0 | $0 | 2025-07 |
| Mequon Womans Club | 501(c)(4) | 1965 | $-1,138 | $56,092 | 2025-05 | |
| American Saddle Horse Breeders Futurity of Wisconsn Inc | 501(c)(5) | 1978 | $-2,541 | $116,041 | 2025-12 | |
| Wisconsin Futurity Horse Festival | Recreation and sports | 501(c)(3) | 1999 | $-21,446 | $119,081 | 2024-12 |
By cause in Mequon, WI
- Philanthropy, voluntarism and grantmaking foundations 30
- Education 26
- Recreation and sports 14
- Religion-related 13
- Arts, culture and humanities 12
- Human services 11
- Housing and shelter 8
- International, foreign affairs and national security 7
- Community improvement and capacity building 6
- Health care 5
- Diseases, disorders and medical disciplines 5
- Animal-related 5
- Environment 5
- Youth development 5
- Mental health and crisis intervention 4
- Public and societal benefit 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.