Data / Nonprofits / Wisconsin / Lake Mills
Nonprofits in Lake Mills, WI: 50 registered with the IRS
50 nonprofits are registered with the IRS in Lake Mills, WI, 38 of them 501(c)(3) charities; the 15 that report revenue took in $4.9 million. The largest by revenue: Lake Mills Area Community Foundation Inc ($1.4 million), St Vincent de Paul Society of Lake Mills ($1.3 million), Trinity Pines Retirement Center Inc ($457,023). Most common causes: education (9), recreation and sports (8), human services (5).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Lake Mills Area Community Foundation Inc | Human services | 501(c)(3) | 1998 | $1.4 million | $7.1 million | 2025-12 |
| St Vincent de Paul Society of Lake Mills | Human services | 501(c)(3) | 2017 | $1.3 million | $2.7 million | 2025-09 |
| Trinity Pines Retirement Center Inc | Human services | 501(c)(3) | 1987 | $457,023 | $1.9 million | 2025-12 |
| Rock Lake Activity Center Inc | 501(c)(3) | 2006 | $297,166 | $434,272 | 2025-12 | |
| Lakeside Lutheran Foundation Inc | Education | 501(c)(3) | 1989 | $276,285 | $2.3 million | 2026-06 |
| Wisconsin Independent Charter School Advocates Inc | Education | 501(c)(3) | 2023 | $268,118 | $131,011 | 2024-12 |
| Wisconsin Outlawz Fastpitch Inc | Recreation and sports | 501(c)(3) | 2019 | $165,413 | $59,090 | 2025-12 |
| Lake Mills Main Street Program Inc | Community improvement and capacity building | 501(c)(3) | 2014 | $160,857 | $125,848 | 2025-12 |
| Lake Mills Food Pantry Inc | Food, agriculture and nutrition | 501(c)(3) | 2008 | $122,365 | $414,818 | 2025-12 |
| Wisconsin Charter Action Inc | Education | 501(c)(4) | 2025 | $98,300 | $10,225 | 2024-12 |
| Tcat Foundation | Recreation and sports | 501(c)(3) | 2023 | $97,842 | $75,319 | 2024-12 |
| Friends of Aztalan State Park Inc | Recreation and sports | 501(c)(3) | 2004 | $68,227 | $525,959 | 2025-12 |
| Rotary International | 501(c)(4) | 1942 | $66,869 | $73,307 | 2026-06 | |
| Lake Mills Area Chamber of Commerce | Community improvement and capacity building | 501(c)(6) | 2005 | $27,245 | $40,834 | 2024-12 |
| Lake Mills Rotary Foundation Inc | Education | 501(c)(3) | 1999 | $24,942 | $150,759 | 2025-06 |
| American Legion Post 67 Clarence Be An-Warren George | 501(c)(19) | 2026 | 2020-08 | |||
| Camrock MTB Inc | Recreation and sports | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Central Wisconsin Lutheran Schools | Religion-related | 501(c)(3) | 1966 | |||
| Christ Evangelical Lutheran Church | 501(c)(3) | 1941 | ||||
| Future Farmers of America State Associations & Local Chapter | 501(c)(3) | 1945 | $0 | $0 | 2025-12 | |
| Great Lakes Chapter Naval Cryptologic Veterans Association | Public and societal benefit | 501(c)(19) | 2019 | $0 | $0 | 2025-12 |
| International Association of Lions Clubs | 501(c)(4) | 1971 | $0 | $0 | 2025-06 | |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-12 | |
| Lake Mills Aztalan Historical Society Inc | Arts, culture and humanities | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Lake Mills Club 55 Senior Center | Human services | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Lake Mills Elementary School Pto Inc | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-06 |
| Lake Mills Girls Hoops Club | Recreation and sports | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Lake Mills United Methodist Church | 501(c)(3) | 1974 | 2010-12 | |||
| Lakeside Lutheran High School | 501(c)(3) | 1966 | 2025-06 | |||
| Modeling Teachers International | Education | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Modern Woodmen of America | 501(c)(8) | 1961 | $0 | $0 | 2025-12 | |
| Moravian Church | 501(c)(3) | 1964 | ||||
| Optimist International | 501(c)(4) | 1958 | $0 | $0 | 2025-09 | |
| Organic Disciplines Inc | Education | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Real Hope Community Church | 501(c)(3) | 1974 | ||||
| Recovery Support Center | Human services | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Remember Me Ranch | Animal-related | 501(c)(3) | 2011 | $0 | $0 | 2024-12 |
| Rock Lake Baptist Church 403 Mulberry | 501(c)(3) | 1976 | ||||
| Rock Lake Baptist Church Inc | 501(c)(3) | 1971 | ||||
| Rock Lake Improvement Association Inc | Environment | 501(c)(3) | 2004 | $0 | $0 | 2024-12 |
| St Paul Lutheran Church | 501(c)(3) | 1966 | ||||
| Steve and Christa Slinger Family Gift Fund Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2022 | $309,445 | 2025-12 | |
| Sunrise Reach Incorporated | Food, agriculture and nutrition | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Sunset Sanctuary | Education | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Tyranena Youth Sports Organization Inc | Recreation and sports | 501(c)(3) | 2016 | $0 | $0 | 2024-12 |
| William P Schmeisser Memorial Fund | Education | 501(c)(3) | 2004 | $0 | $0 | 2026-02 |
| Wisco Women On Water | Recreation and sports | 501(c)(3) | 2025 | |||
| Wisconsin Alliance of Forest Owners | Community improvement and capacity building | 501(c)(6) | 2014 | $0 | $0 | 2025-12 |
| Wisconsin Boiler Inspectors Association | Mutual and membership benefit | 501(c)(6) | 2014 | $0 | $0 | 2025-12 |
| Wisconsin Pinto Horse Association | Recreation and sports | 501(c)(4) | 2020 | $0 | $28,174 | 2024-12 |
By cause in Lake Mills, WI
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.