Data / Nonprofits / Wisconsin / Oconomowoc
Nonprofits in Oconomowoc, WI: 296 registered with the IRS
296 nonprofits are registered with the IRS in Oconomowoc, WI, 209 of them 501(c)(3) charities; the 68 that report revenue took in $462.8 million. The largest by revenue: Rogers Memorial Hospital Incorporated ($346.8 million), Lutheran Homes of Oconomowoc Inc ($29.2 million), Glacial Community YMCA Inc ($20.2 million). Most common causes: recreation and sports (32), education (24), religion-related (15).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Rogers Memorial Hospital Incorporated | Health care | 501(c)(3) | 1971 | $346.8 million | $647.8 million | 2024-12 |
| Lutheran Homes of Oconomowoc Inc | Human services | 501(c)(3) | 1954 | $29.2 million | $93.1 million | 2025-12 |
| Glacial Community YMCA Inc | Human services | 501(c)(3) | 1944 | $20.2 million | $48.1 million | 2025-12 |
| Rogers Behavioral Health - Illinois Inc | Mental health and crisis intervention | 501(c)(3) | 2024 | $8.7 million | $16.1 million | 2024-12 |
| Lake Country Classical Academy Inc | Education | 501(c)(3) | 2019 | $8.2 million | $5.3 million | 2025-06 |
| Rogers Behavioral Health - Georgia Inc | Mental health and crisis intervention | 501(c)(3) | 2020 | $5.3 million | $15.1 million | 2024-12 |
| Rogers Memorial Hospital Foundation Inc | Health care | 501(c)(3) | 1980 | $5.2 million | $47 million | 2024-12 |
| Adeline Montessori School Inc | Education | 501(c)(3) | 2022 | $4.7 million | $1.2 million | 2025-06 |
| Rogers Behavioral Health - Washington Inc | Mental health and crisis intervention | 501(c)(3) | 2021 | $4.4 million | $13.1 million | 2024-12 |
| Oconomowoc Golf Club | Recreation and sports | 501(c)(7) | 1940 | $3.5 million | $4.9 million | 2025-10 |
| Rogers Behavioral Health - Colorado Inc | Mental health and crisis intervention | 501(c)(3) | 2022 | $3.1 million | $7.6 million | 2024-12 |
| Journey 21 Inc | Housing and shelter | 501(c)(3) | 2021 | $2.8 million | $10.5 million | 2025-12 |
| Wisconsin Principles Inc | Civil rights, social action and advocacy | 501(c)(4) | 2024 | $2.8 million | $85,826 | 2024-12 |
| Rogers Behavioral Health - Tennessee Inc | Mental health and crisis intervention | 501(c)(3) | 2024 | $2.6 million | $3.6 million | 2024-12 |
| Lake Area Free Clinic Inc | Health care | 501(c)(3) | 2001 | $2.4 million | $3.3 million | 2025-12 |
| Rogers Behavioral Health System Inc | Health care | 501(c)(3) | 2009 | $1.9 million | $2.1 million | 2024-12 |
| Oconomowoc Lake Club | 501(c)(7) | 1950 | $1.4 million | $3.7 million | 2024-12 | |
| American Friends of Journey House Actions Rwanda Inc | International, foreign affairs and national security | 501(c)(3) | 2021 | $833,434 | $597,795 | 2025-12 |
| React 19 Inc | Health care | 501(c)(3) | 2022 | $722,890 | $353,930 | 2024-12 |
| Wildlife in Need Center LTD | Animal-related | 501(c)(3) | 1994 | $703,145 | $2.1 million | 2025-03 |
| Lutheran Homes of Oconomowoc Charitable Foundation Inc | Religion-related | 501(c)(3) | 1997 | $591,575 | $8.9 million | 2025-12 |
| Rogers Behavioral Health - Pennsylvania Inc | Mental health and crisis intervention | 501(c)(3) | 2024 | $566,775 | $760,782 | 2024-12 |
| Greater Oconomowoc Area Chamber of Commerce Inc | 501(c)(6) | 1987 | $421,322 | $677,343 | 2025-12 | |
| Oconomowoc Parents for Baseball Inc | Recreation and sports | 501(c)(3) | 1999 | $413,787 | $37,104 | 2025-09 |
| Oconomowoc Area Senior Center Inc | 501(c)(3) | 1989 | $368,855 | $547,150 | 2024-12 | |
| Margo Fieseler Ministries | Religion-related | 501(c)(3) | 2014 | $357,114 | $401,874 | 2024-12 |
| Oconomowoc Food Pantry Inc | 501(c)(3) | 1984 | $317,403 | $760,304 | 2025-12 | |
| Oconomowoc Silver Streak Inc | Human services | 501(c)(3) | 1991 | $266,480 | $317,471 | 2024-12 |
| Oconomowoc Scholarship Fund | 501(c)(3) | 1958 | $257,051 | $1.2 million | 2025-06 | |
| Veterans of Foreign Wars of the United States Dept of Wisconsin | 501(c)(19) | 1973 | $226,176 | $583,663 | 2025-06 | |
| Veterans of Foreign Wars of the United States Dept of Wisconsin | 501(c)(19) | 1973 | $188,702 | $565,040 | 2025-12 | |
| Accreditation Review Committee for the Anesthesiologist Assistant | Education | 501(c)(3) | 2014 | $176,000 | $384,787 | 2025-12 |
| Theatre of Oconomowoc LTD | 501(c)(3) | 2005 | $173,079 | $87,068 | 2025-12 | |
| Oconomowoc Cemetery Association | 501(c)(13) | 1992 | $171,087 | $662,081 | 2024-12 | |
| Guatemala Service Projects Inc | International, foreign affairs and national security | 501(c)(3) | 2016 | $157,179 | $27,618 | 2025-12 |
| Oconomowoc Historical Society Inc | 501(c)(3) | 1983 | $156,931 | $898,703 | 2025-10 | |
| German Christmas Market of Oconomowoc | Arts, culture and humanities | 501(c)(3) | 2020 | $152,735 | $505,014 | 2024-12 |
| The Grand Plan Corporation | Education | 501(c)(3) | 2024 | $145,950 | $81,806 | 2025-12 |
| Society of St Vincent de Paul of Waukesha County Inc | Human services | 501(c)(3) | 2020 | $135,774 | $54,915 | 2025-09 |
| Oconomowoc Sports Booster Club Inc Oconomowoc High School | Recreation and sports | 501(c)(3) | 1995 | $135,107 | $99,477 | 2025-05 |
| Oconomowoc Rotary FDN Inc | 501(c)(3) | 1985 | $130,803 | $215,941 | 2025-06 | |
| Edwin L Jones Post No 91 of the Ame Rican Legion Department of Wis | Public and societal benefit | 501(c)(19) | 2026 | $129,889 | $1.2 million | 2022-12 |
| Rotary International | 501(c)(4) | 1958 | $126,835 | $31,709 | 2025-06 | |
| Transparent Watercolor Society of America | Arts, culture and humanities | 501(c)(3) | 1976 | $123,859 | $295,520 | 2025-12 |
| Lake Country Pickleball Club | Recreation and sports | 501(c)(7) | 2023 | $111,917 | $10,633 | 2025-12 |
| Heart of the Father Ministries Inc | Religion-related | 501(c)(3) | 2016 | $92,869 | $184,588 | 2024-12 |
| Legacy Committee Inc | Education | 501(c)(3) | 2022 | $92,290 | $57,697 | 2025-06 |
| Light Their Way Inc | Human services | 501(c)(3) | 2024 | $91,861 | $15,721 | 2025-12 |
| Right Relief Inc | Health care | 501(c)(3) | 2019 | $91,756 | $61,400 | 2025-12 |
| Oconomowoc Festival of the Arts LTD | Arts, culture and humanities | 501(c)(3) | 2012 | $82,775 | $106,811 | 2025-10 |
| Oconomowoc High School Band Aids Inc | Education | 501(c)(3) | 2007 | $81,705 | $50,235 | 2026-05 |
| Oconomowoc Gridiron Club Inc | Education | 501(c)(3) | 2014 | $77,973 | $74,736 | 2025-12 |
| Apostolate of Our Lady of Good Success | Religion-related | 501(c)(3) | 2006 | $73,319 | $95,642 | 2025-12 |
| Oconomowoc Community Theatre | Arts, culture and humanities | 501(c)(3) | 2023 | $68,031 | $34,545 | 2025-12 |
| Meghans Mission Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2021 | $66,346 | $10,996 | 2025-12 |
| Memorial Hospital at Oconomowoc Auxiliary Inc | 501(c)(3) | 1965 | $65,082 | $382,162 | 2025-09 | |
| Midwest Alpine Racing Inc | Recreation and sports | 501(c)(3) | 2019 | $58,589 | $102,210 | 2025-06 |
| Southeast Wisconsin Land Conservancy | Environment | 501(c)(3) | 2021 | $58,008 | $766,922 | 2025-12 |
| Friends of Oconomowoc Parks and Trails Inc | Recreation and sports | 501(c)(3) | 2021 | $55,982 | $95,391 | 2025-12 |
| Lake Area Club Inc | Human services | 501(c)(3) | 1987 | $52,920 | $129,747 | 2025-07 |
| Summit School Pto | Education | 501(c)(3) | 2014 | $44,849 | $20,363 | 2026-06 |
| Prader-Willi Syndrome Association of Wisconsin Inc | Human services | 501(c)(3) | 1993 | $40,675 | $89,229 | 2025-12 |
| Gifford Pier Club LTD | Recreation and sports | 501(c)(7) | 2014 | $34,434 | $102,710 | 2025-12 |
| Gods Fund Inc | Religion-related | 501(c)(3) | 2023 | $31,341 | $64,184 | 2025-12 |
| Friends of the State Historical Society of Wisconsin | 501(c)(3) | 1954 | $24,924 | $143,811 | 2024-12 | |
| Crystal Lake Assoc Inc | Environment | 501(c)(3) | 2023 | $21,620 | $13,331 | 2025-12 |
| Ahava Productions Inc | Religion-related | 501(c)(3) | 2013 | $7,584 | $118,307 | 2024-12 |
| Faith Resource Community Inc | Religion-related | 501(c)(3) | 2018 | $7,141 | $1,033 | 2023-12 |
| Aarp | 501(c)(4) | 1971 | ||||
| Abundant Life Apostolic Church | 501(c)(3) | 2008 | 2005-12 | |||
| American Federation of State County & Municipal Employees | 501(c)(5) | 1957 | $0 | $0 | 2025-12 | |
| American Legion Auxiliary | 501(c)(19) | 1946 | $0 | $0 | 2025-12 | |
| Americans for Autism Advocacy | Diseases, disorders and medical disciplines | 501(c)(4) | 2023 | $0 | $0 | 2025-12 |
| Americans for Autism Advocacy Foundation | Mental health and crisis intervention | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Annabelle Acres Incorporated | Animal-related | 501(c)(3) | 2024 | $6,815 | 2025-12 | |
| Arrowhead Diamond Club | Recreation and sports | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Ashippun Historical Society Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Audi Car Club North America | 501(c)(3) | 2002 | ||||
| Audi Car Club North America | 501(c)(3) | 2002 | ||||
| Audi Car Club North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | Public safety, disaster preparedness and relief | 501(c)(3) | 2002 | |||
| Audi Car Club of North America | Public safety, disaster preparedness and relief | 501(c)(3) | ||||
| Audi Car Club of North America | Public safety, disaster preparedness and relief | 501(c)(3) | 2002 | |||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | Public safety, disaster preparedness and relief | 501(c)(3) | 2002 | |||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | Public safety, disaster preparedness and relief | 501(c)(3) | 2002 | |||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | Public safety, disaster preparedness and relief | 501(c)(3) | 2002 | |||
| Audi Car Club of North America | Public safety, disaster preparedness and relief | 501(c)(3) | 2002 | |||
| Audi Car Club of North America | Public safety, disaster preparedness and relief | 501(c)(3) | 2002 | |||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | 501(c)(3) | 2002 | ||||
| Audi Car Club of North America | Public safety, disaster preparedness and relief | 501(c)(3) | 2002 | |||
| Bark River Bible Fellowship Inc | Religion-related | 501(c)(3) | 2018 | |||
| Barn Racing Team Inc | Recreation and sports | 501(c)(7) | 2023 | $0 | $0 | 2025-12 |
| Big Five Tanzania LTD | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Brzezinski Fam Fund Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2001 | $13,631 | 2025-12 | |
| Canticum Novum A Wels Chamber Choir Inc | Arts, culture and humanities | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Capstone Church Inc | Religion-related | 501(c)(3) | 2002 | |||
| Carol and Richard Bayerlein Foundation LTD | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2001 | $321,720 | 2025-12 | |
| Catahome Feline Sanctuary | Animal-related | 501(c)(3) | 2023 | $9,442 | 2025-12 | |
| Christian and Missionary Alliance Bible Church | 501(c)(3) | 1972 | ||||
| Club Humor Inc | Recreation and sports | 501(c)(7) | 2008 | $0 | $0 | 2025-12 |
| Cornerstone Church of Madison Wisconsin Inc | 501(c)(3) | 1988 | ||||
| Cosmic Stem Lab | Education | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Crosspoint Community Church of the Christian & Missionry Alliance Inc | 501(c)(3) | 1972 | 2010-12 | |||
| Debbink Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1998 | $5.6 million | 2025-12 | |
| Delta Gamma Fraternity | 501(c)(7) | 1963 | $0 | $0 | 2025-06 | |
| Delta Sigma Delta Fraternity | 501(c)(7) | 1967 | $0 | $0 | 2024-12 | |
| Delta Sigma Delta Fraternity | 501(c)(7) | 1959 | $0 | $0 | 2025-12 | |
| Delta Sigma Delta Fraternity | 501(c)(7) | 1967 | $0 | $0 | 2025-12 | |
| Delta Sigma Delta Fraternity | 501(c)(7) | 1967 | $0 | $0 | 2024-12 | |
| Delta Sigma Delta Fraternity | 501(c)(7) | 1967 | $0 | $0 | 2024-12 | |
| Delta Theta Sigma Educational Foundation of Gamma Chapter Inc | Education | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Dr Martin Luther Church | 501(c)(3) | 1988 | 2013-12 | |||
| Dress Campaign Inc | Human services | 501(c)(3) | 2023 | $0 | $0 | 2024-12 |
| Earl and Eugenia Quirk Foundation Inc | 501(c)(3) | 1964 | $3.4 million | 2026-04 | ||
| Ek Provisions Inc | Food, agriculture and nutrition | 501(c)(3) | 2026 | |||
| Elder Justice Foundation Inc | Human services | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Elite Skating Academy Inc | Recreation and sports | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Emil Ewald Foundation Inc | 501(c)(3) | 1991 | $22.3 million | 2025-12 | ||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1969 | ||||
| Executive Women International | 501(c)(6) | 1966 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1968 | ||||
| Executive Women International | 501(c)(6) | 1964 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1961 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1960 | ||||
| Executive Women International | 501(c)(6) | 1957 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | |||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1990 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International | 501(c)(6) | 1950 | ||||
| Executive Women International Business Career Development Progra | 501(c)(6) | 1950 | ||||
| Executive Women International Business Career Development Progra | 501(c)(6) | 1950 | ||||
| Executive Women International Business Career Development Progra | 501(c)(6) | 1950 | ||||
| Executive Women International Business Career Development Progra | 501(c)(6) | 1950 | ||||
| Executive Women International Business Career Development Progra | 501(c)(6) | 1950 | ||||
| Executive Women International Business Career Development Progra | 501(c)(6) | 1950 | ||||
| Executive Women International Business Career Development Progra | 501(c)(6) | 1950 | ||||
| Executive Women International Business Career Development Progra | 501(c)(6) | 1950 | ||||
| FR Das Misson To India Inc | International, foreign affairs and national security | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Faith Baptist Church of Oconomowoc Inc | 501(c)(3) | 1975 | ||||
| First Congregational United Church of Oconomowoc Inc | 501(c)(3) | 1994 | ||||
| Friends of Imagination Station Inc | Recreation and sports | 501(c)(3) | 2010 | $0 | $0 | 2026-05 |
| Friends of the Oconomowoc Public Library | Education | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Friendship Force of Greater Milwaukee Inc | Environment | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Golden Lake Association Inc | Environment | 501(c)(3) | 2002 | $0 | $0 | 2025-12 |
| Grace & Peace Oconomowoc | 501(c)(3) | 1974 | ||||
| Grace Bible Church | 501(c)(3) | 1964 | ||||
| Greenland Pto | Education | 501(c)(3) | 2017 | $0 | $0 | 2025-06 |
| Heritage Shooting Inc | Recreation and sports | 501(c)(3) | 1997 | $0 | $0 | 2026-03 |
| Herrington-McBride Alumni Association and Foundation Inc | Mental health and crisis intervention | 501(c)(3) | 2013 | $0 | $0 | 2024-12 |
| Holy Trinity Evangelical Lutheran Church of Okauchee Inc | 501(c)(3) | 1972 | ||||
| Hope Chimes Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2024 | $0 | $0 | 2025-10 |
| Hope Church of Wisconsin Inc | 501(c)(3) | 1966 | ||||
| Imagine A Day Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2009 | $0 | $0 | 2025-05 |
| International Association of Lions Clubs | 501(c)(4) | 1940 | $0 | $0 | 2025-06 | |
| International Dyslexia Association Wisconsin Branch Inc | 501(c)(3) | 1985 | $0 | $0 | 2025-12 | |
| International Society for Business Education USA Chapter | Education | 501(c)(3) | 2023 | $0 | $0 | 2025-05 |
| Jacob Butschke Scholarship Fund | Education | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Joyful Daughter Foundation | International, foreign affairs and national security | 501(c)(3) | 2017 | $0 | $0 | 2023-12 |
| Jr Hearts | Health care | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
| Jubilate Chorale Inc | Arts, culture and humanities | 501(c)(3) | 2007 | $0 | $0 | 2025-12 |
| Kettle Moraine Curling School Inc | Recreation and sports | 501(c)(3) | 2016 | $0 | $0 | 2025-09 |
| Kiwanis International Inc | 501(c)(4) | 1940 | $0 | $0 | 2025-09 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-06 | |
| LC Dockhounds Foundation Inc | Recreation and sports | 501(c)(3) | 2024 | $71,059 | 2024-12 | |
| La Belle Area Foundation Inc | Recreation and sports | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| La Belle Fireworks | Community improvement and capacity building | 501(c)(4) | 2025 | $0 | $0 | 2025-09 |
| La Belle Yacht Club Sailing School Corporation | Recreation and sports | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Labelle Ballet Company | Arts, culture and humanities | 501(c)(3) | 2025 | |||
| Lac La Belle Environmental Foundation Inc | Environment | 501(c)(3) | 1994 | $0 | $0 | 2024-12 |
| Lake Country Newcomers & Neighbors Inc | Community improvement and capacity building | 501(c)(3) | 2024 | $0 | $0 | 2025-05 |
| Lake Country Shop With Cops | Youth development | 501(c)(3) | 2009 | $0 | $0 | 2024-12 |
| Living 4 Lindsey Foundation Inc | Public and societal benefit | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Love in A Shoebox | Religion-related | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Mac-Jack Memorial Foundation Incorporated | Medical research | 501(c)(3) | 2019 | $0 | $0 | 2025-05 |
| Madison Salvation Church of God Inc | Religion-related | 501(c)(3) | 2025 | |||
| Making A Mark Foundation Inc | Mental health and crisis intervention | 501(c)(3) | 2022 | $0 | $0 | 2025-10 |
| Maple Terrace Association On Lac Labelle Inc | Recreation and sports | 501(c)(9) | 2024 | $0 | $0 | 2025-12 |
| Maranatha Renewal Ministries Inc | 501(c)(3) | 1980 | ||||
| Mark Hansen Shark34 Fund | Education | 501(c)(3) | 2024 | |||
| Mathematics Institute of Wi | Education | 501(c)(3) | 2014 | $925,392 | 2025-12 | |
| Meadow View Elementary Pto | Youth development | 501(c)(3) | 2012 | $0 | $0 | 2025-07 |
| Michael and Beverly Bruno Family Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2002 | $643,290 | 2024-12 | |
| Milwaukee Handbell Ensemble Inc | Arts, culture and humanities | 501(c)(3) | 2013 | $0 | $0 | 2025-06 |
| Milwaukee Torrent Community Foundation Inc | Recreation and sports | 501(c)(3) | 2016 | $0 | $0 | 2025-12 |
| Moonlit Movies LTD | Recreation and sports | 501(c)(3) | 2019 | $0 | $0 | 2025-09 |
| National Association of Orthopaedic Nurses Inc | 501(c)(6) | 1981 | $0 | $0 | 2025-12 | |
| National Rural Letter Carriers Association | 501(c)(5) | 1972 | $0 | $0 | 2025-06 | |
| New Beginnings Aviation Ministry Inc | Science and technology | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Nhi Pto | Education | 501(c)(3) | 2021 | $0 | $0 | 2023-07 |
| North American Lutheran Church | Religion-related | 501(c)(3) | 2014 | |||
| Oconomowoc American Legion Band | Public and societal benefit | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Oconomowoc Area Chamber of Commerce Foundation Inc | Community improvement and capacity building | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| Oconomowoc Area Veterans Group Inc | Public and societal benefit | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Oconomowoc Chamber Orchestra | Arts, culture and humanities | 501(c)(3) | 2010 | $0 | $0 | 2026-05 |
| Oconomowoc Community Choir Inc | Education | 501(c)(3) | 1998 | $0 | $0 | 2026-06 |
| Oconomowoc Full Gospel Tabernacle Inc | 501(c)(3) | 1987 | ||||
| Oconomowoc Junior Raccoons Volleyball | Recreation and sports | 501(c)(3) | 2020 | $0 | $0 | 2025-06 |
| Oconomowoc Junior Womans Club Inc | Human services | 501(c)(3) | 2002 | $0 | $0 | 2026-06 |
| Oconomowoc Public Education Foundation Inc | Education | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Oconomowoc Wrestling Booster Club | Recreation and sports | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Ohs Drama Mamas and Papas Inc | Education | 501(c)(3) | 2009 | $0 | $0 | 2025-12 |
| Ohs Pto Inc | Education | 501(c)(3) | 2012 | $0 | $0 | 2025-12 |
| Okauchee Area Atv Utv Club Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Okauchee Fireworks Fund LTD | Human services | 501(c)(4) | 2006 | $0 | $0 | 2024-12 |
| Old Time Ball Players Association of Wis | Recreation and sports | 501(c)(7) | 2002 | $0 | $0 | 2025-12 |
| Old Time Ballplayers Association of Wisconsin Charity Inc | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Our Lady of Fatima Home Visitation Program | Religion-related | 501(c)(3) | 2014 | $0 | $0 | 2024-08 |
| Our Saviors Lutheran Church | 501(c)(3) | 1988 | 2012-12 | |||
| Park Lawn Elementary Parent Teacher Organization | Education | 501(c)(3) | 2021 | $0 | $0 | 2026-07 |
| Peer Round Table for Chros Inc | Community improvement and capacity building | 501(c)(6) | 2018 | $0 | $0 | 2025-12 |
| Pflag Oconomowoc | 501(c)(3) | 1994 | $0 | $0 | 2025-09 | |
| Post 91 Oconomowoc Veterans | Public and societal benefit | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Prairie Gold Foundation Inc | Food, agriculture and nutrition | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Professional Homecare Providers | Philanthropy, voluntarism and grantmaking foundations | 501(c)(6) | 1999 | $0 | $0 | 2025-12 |
| Renaissance Coalition | 501(c)(3) | 1982 | ||||
| Restoration Fellowship Inc | 501(c)(3) | 1991 | ||||
| Rock Apostolic Ministries Inc | Religion-related | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Roehl Foundation Inc | 501(c)(3) | 1960 | $7.1 million | 2026-06 | ||
| Rye Revival Inc | Food, agriculture and nutrition | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Saint Matthews Ev Lutheran School | 501(c)(3) | 1966 | ||||
| Saint Paul Lutheran Church | 501(c)(3) | 1941 | ||||
| Second Chance of Geneseo Inc | Human services | 501(c)(3) | 1996 | $0 | $0 | 2025-12 |
| Second Gear Group Inc | Community improvement and capacity building | 501(c)(3) | 2023 | $0 | $0 | 2023-12 |
| Silver Circle Foundation Inc | Crime and legal-related | 501(c)(3) | 2021 | $27,227 | 2024-02 | |
| Silver Lake Intermediate School Pto | Education | 501(c)(3) | 2013 | $0 | $0 | 2024-08 |
| Simply Helping People Inc | Human services | 501(c)(3) | 2018 | $0 | $0 | 2025-12 |
| Ski Wisconsin LLC | Recreation and sports | 501(c)(7) | 2026 | |||
| Society of St Vincent de Paul of Waukesha County Inc | 501(c)(3) | 2020 | $0 | $0 | 2025-09 | |
| Southeast Fox River Partnership | Environment | 501(c)(3) | 2006 | $0 | $0 | 2025-12 |
| Southeast Wisconsin Lacrosse Association Inc | Recreation and sports | 501(c)(3) | 2011 | $0 | $0 | 2024-12 |
| St John Lutheran Church | 501(c)(3) | 1941 | 2013-12 | |||
| St Johns Lutheran Church | 501(c)(3) | 1988 | ||||
| St Pauls E Lutheran Church and School | 501(c)(3) | 1941 | ||||
| Stone Bank School Pto Inc | Education | 501(c)(3) | 2012 | $0 | $0 | 2025-08 |
| Stone Bank Sportsmens Club Inc | Recreation and sports | 501(c)(4) | 2023 | 2024-12 | ||
| Stonebank Baseball Corporation | 501(c)(3) | 2021 | $0 | $0 | 2025-12 | |
| Team Tour de Friends Inc | Recreation and sports | 501(c)(7) | 2019 | $0 | $0 | 2025-12 |
| The Oconomowoc Womans Club | Human services | 501(c)(3) | 2020 | $0 | $0 | 2025-06 |
| Thirst4jesus Inc | Religion-related | 501(c)(3) | 2019 | |||
| Tops Club Inc | Health care | 501(c)(3) | 2008 | $0 | $0 | 2026-03 |
| United States Bowling Congress Inc | Recreation and sports | 501(c)(3) | 2004 | $0 | $0 | 2025-07 |
| Veterans of Foreign Wars of the United States Dept of Wisconsin | 501(c)(19) | 1973 | $0 | $0 | 2026-06 | |
| Victor F Braun Foundation Inc | 501(c)(3) | 1958 | $5.2 million | 2025-11 | ||
| Vietnam Veterans of America Inc | 501(c)(19) | 1984 | $0 | $0 | 2025-02 | |
| Vietnam Veterans of America Inc | 501(c)(19) | 1984 | $0 | $0 | 2025-02 | |
| Walk for Water Inc | International, foreign affairs and national security | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Walker Memorial Foundation Inc | Recreation and sports | 501(c)(3) | 2025 | |||
| Waukesha County Dairy Promotion Committee Inc | 501(c)(5) | 1994 | $0 | $0 | 2025-12 | |
| Waukesha County Holstein Breeders Association | 501(c)(5) | 1944 | $0 | $0 | 2024-12 | |
| Way Maker Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $1.6 million | 2024-12 | |
| Western Lakes Fire & Ems Association Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| White Stone Community Church | 501(c)(3) | 1972 | ||||
| Wisconsin Breastfeeding Coalition | Health care | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| Wisconsin Elfuns Inc | Recreation and sports | 501(c)(7) | 2015 | $0 | $0 | 2025-12 |
| Wisconsin Lutheran Institutional Ministries Inc | 501(c)(3) | 1966 | ||||
| Wisconsin Off Highway Motorcycle Association | Recreation and sports | 501(c)(4) | 2013 | $0 | $0 | 2025-12 |
| Wisconsin Section of the Institute of Food Technologists Inc | Community improvement and capacity building | 501(c)(6) | 2015 | $0 | $0 | 2026-08 |
| Wisconsin Women 4 Our Troops Inc | Public and societal benefit | 501(c)(3) | 2021 | $2 | 2025-12 |
By cause in Oconomowoc, WI
- Recreation and sports 32
- Education 24
- Religion-related 15
- Human services 14
- Public safety, disaster preparedness and relief 11
- Arts, culture and humanities 10
- Philanthropy, voluntarism and grantmaking foundations 9
- Health care 9
- Mental health and crisis intervention 9
- Environment 6
- Community improvement and capacity building 6
- Public and societal benefit 6
- International, foreign affairs and national security 5
- Animal-related 3
- Food, agriculture and nutrition 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.