Data / Nonprofits / Wisconsin / Sister Bay
Nonprofits in Sister Bay, WI: 21 registered with the IRS
21 nonprofits are registered with the IRS in Sister Bay, WI, 18 of them 501(c)(3) charities; the 7 that report revenue took in $4 million. The largest by revenue: Northern Door Child Care Project Inc ($1.7 million), Midsummers Music LTD ($694,655), Senior Citizens Agency of Northern Door Inc ($562,389). Most common causes: human services (3).
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Every organization, largest by revenue first
| Organization | Category | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|---|
| Northern Door Child Care Project Inc | Human services | 501(c)(3) | 1986 | $1.7 million | $4 million | 2024-12 |
| Midsummers Music LTD | Arts, culture and humanities | 501(c)(3) | 1995 | $694,655 | $1.3 million | 2024-12 |
| Senior Citizens Agency of Northern Door Inc | Human services | 501(c)(3) | 1979 | $562,389 | $840,602 | 2025-12 |
| Sister Bay Advancement Association | Community improvement and capacity building | 501(c)(6) | 2009 | $494,116 | $384,845 | 2025-12 |
| Sister Bay Historical Society Inc | Arts, culture and humanities | 501(c)(3) | 2003 | $372,725 | $1.3 million | 2024-12 |
| Sister Bay and Liberty Grove Firefighters Association Inc | Health care | 501(c)(3) | 1995 | $125,040 | $341,174 | 2025-12 |
| International Association of Lions Clubs | 501(c)(4) | 1966 | $54,108 | $17,296 | 2025-06 | |
| Door County Bridges Inc | Education | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Door County Environmental Council Inc | 501(c)(3) | 1971 | $0 | $0 | 2025-12 | |
| Door of Life Christain Church Inc | Religion-related | 501(c)(3) | 2002 | |||
| First Baptist Church | 501(c)(3) | 1972 | ||||
| Friends of the Sister Bay Ice Rink Inc | Recreation and sports | 501(c)(3) | 2025 | |||
| Northern Door First Responders | Public safety, disaster preparedness and relief | 501(c)(3) | 1997 | $0 | $0 | 2025-12 |
| Northern Door Pride Co | Civil rights, social action and advocacy | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Orchard Evangelical Free Church | 501(c)(3) | 1965 | ||||
| Rock On the Rock Inc | Human services | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Rosemann Family Foundation Inc | 501(c)(3) | 1990 | $3.7 million | 2026-07 | ||
| Sister Bay Lions Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2014 | $0 | $0 | 2026-06 |
| Sister Bay Moravian Church | 501(c)(3) | 1964 | ||||
| Trillium Quilt Guild | 501(c)(7) | 2007 | $0 | $0 | 2026-05 | |
| Womens Rights Data Initiative Inc | 501(c)(3) | 2026 |
By cause in Sister Bay, WI
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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.