Data / Nonprofits / Wisconsin / Mayville
Nonprofits in Mayville, WI: 57 registered with the IRS
57 nonprofits are registered with the IRS in Mayville, WI, 43 of them 501(c)(3) charities; the 13 that report revenue took in $2 million. The largest by revenue: Wings Over Wisconsin Inc ($657,986), Horicon Marsh Sportsmens Club Inc ($285,221), Mayville Open Door Inc ($248,275). Most common causes: education (7), community improvement and capacity building (6), recreation and sports (6).
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 |
|---|---|---|---|---|---|---|
| Wings Over Wisconsin Inc | Environment | 501(c)(3) | 1981 | $657,986 | $3.2 million | 2025-12 |
| Horicon Marsh Sportsmens Club Inc | Recreation and sports | 501(c)(7) | 2014 | $285,221 | $451,489 | 2024-01 |
| Mayville Open Door Inc | Human services | 501(c)(3) | 2015 | $248,275 | $417,289 | 2024-12 |
| Wisconsin State Fair Dairy Promotion Fund Inc | 501(c)(6) | 1990 | $184,656 | $409,861 | 2025-12 | |
| Communications Workers of America Local 4652 | Employment | 501(c)(5) | 2021 | $129,333 | $455,610 | 2025-09 |
| Horicon Marsh Archers Inc | Education | 501(c)(3) | 2023 | $91,871 | $4.5 million | 2025-12 |
| American Legion | 501(c)(19) | $91,673 | $260,801 | 2024-12 | ||
| Mayville Limestone School Museum Inc | Arts, culture and humanities | 501(c)(3) | 1983 | $64,728 | $1 million | 2025-06 |
| Rotary International | 501(c)(4) | 1942 | $53,545 | $43,128 | 2024-06 | |
| Main Street Mayville Inc | Community improvement and capacity building | 501(c)(3) | 1998 | $48,704 | $23,110 | 2025-12 |
| Graceland Cemetery Association | 501(c)(13) | 1944 | $48,291 | $200,468 | 2025-12 | |
| Pta Wisconsin Congress | 501(c)(3) | 1972 | $37,189 | $27,901 | 2025-06 | |
| International Association of Lions Clubs | 501(c)(4) | 1969 | $25,700 | $77,159 | 2025-06 | |
| Christian Life Fellowship Assembly of God | 501(c)(3) | 1964 | ||||
| Courageous Hearts Inc | Mental health and crisis intervention | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Emmanuel Cemetery Assoication | Mutual and membership benefit | 501(c)(13) | 2017 | $0 | $0 | 2025-12 |
| Field & Stream Sportsmens Club Horicon Marsh Area Inc | 501(c)(4) | 1969 | $0 | $0 | 2025-08 | |
| Flyway Clay Slayers Inc | Recreation and sports | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Friends of Horicon National Wildlife Refuge | Environment | 501(c)(3) | 2003 | $0 | $0 | 2025-09 |
| Friends of the Mayville Public Library Inc | Community improvement and capacity building | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Froemming Foundation Charities Inc | Human services | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Gateway Community Church of Mayville Inc | 501(c)(3) | 1974 | ||||
| Immanuel Lutheran Church | 501(c)(3) | 1941 | ||||
| International Association of Lions Clubs | 501(c)(4) | 1940 | $0 | $0 | 2026-06 | |
| International Association of Lions Clubs | 501(c)(4) | 1940 | $0 | $0 | 2025-12 | |
| Iron Ridge Trap Club | Recreation and sports | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Kekoskee Williamstown Historicalsociety Inc | Arts, culture and humanities | 501(c)(3) | 2008 | $0 | $0 | 2025-12 |
| Knights of Columbus | 501(c)(8) | 1994 | $0 | $0 | 2025-12 | |
| Marais Players Inc | Arts, culture and humanities | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Mayville Athletic Booster Club Inc | Education | 501(c)(3) | 2015 | $0 | $0 | 2025-05 |
| Mayville Cares Inc | Community improvement and capacity building | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Mayville Historical Society Inc | 501(c)(3) | 1968 | $0 | $0 | 2025-12 | |
| Mayville Kickoff Club Inc | Education | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Mayville Pto Inc | Education | 501(c)(3) | 2025 | |||
| Mayville Rotary Scholarship Foundation Inc | Community improvement and capacity building | 501(c)(3) | 2014 | $0 | $0 | 2026-04 |
| Mayville Senior Citizens Inc | 501(c)(3) | 1980 | $0 | $0 | 2025-12 | |
| Mayville Summer Sting | Recreation and sports | 501(c)(3) | 2014 | $0 | $0 | 2023-08 |
| Mayville Youth Baseball Club | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Mayville Youth Wrestling Team | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Overflow Ministries Incorporated | Religion-related | 501(c)(3) | 2026 | |||
| Patys Project Inc | International, foreign affairs and national security | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |
| Remember Your Why Inc | Mental health and crisis intervention | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Rock River Snowmobile Club Inc | 501(c)(7) | 1976 | $0 | $0 | 2025-06 | |
| Simply Giving Co | Youth development | 501(c)(3) | 2023 | $0 | $0 | 2025-12 |
| Soccer Assoc for Youth On for Youth | Recreation and sports | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Southeast District Wahce | 501(c)(3) | 1988 | $0 | $0 | 2025-12 | |
| St Johns Lutheran Church | 501(c)(3) | 1941 | 2011-07 | |||
| St Marys Congregation | 501(c)(3) | 1946 | 2011-12 | |||
| St Peter Lutheran Church | 501(c)(3) | 1966 | ||||
| TCC and Friends Incorporated | Community improvement and capacity building | 501(c)(3) | 2025 | |||
| Tag Center Inc | Recreation and sports | 501(c)(3) | 2000 | $652,104 | 2025-12 | |
| Ted and Grace Bachhuber Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 1983 | $24.7 million | 2025-12 | |
| Veterans Memorial of Mayville Inc | Arts, culture and humanities | 501(c)(3) | 2011 | $0 | $0 | 2025-12 |
| Veterans of Foreign Wars of the United States Dept of Wisconsin | 501(c)(19) | 1973 | $0 | $0 | 2024-12 | |
| Wisconsin Association for Home and Community Education Inc | Community improvement and capacity building | 501(c)(3) | 1988 | $0 | $0 | 2025-12 |
| Women and Youth Sporting Education Inc | Education | 501(c)(3) | 2015 | $0 | $0 | 2023-12 |
| Wounded Wings Association for the Betterment of Women and Girls Inc | Public and societal benefit | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
By cause in Mayville, WI
- Education 7
- Community improvement and capacity building 6
- Recreation and sports 6
- Arts, culture and humanities 4
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.