Data / Nonprofits / Connecticut / Mansfield
Nonprofits in Mansfield, CT: 12 registered with the IRS
12 nonprofits are registered with the IRS in Mansfield, CT, 11 of them 501(c)(3) charities; the 2 that report revenue took in $855,287. The largest by revenue: Oak Grove Montessori Elementary School Inc ($792,303), Brigade of the American Revolution ($62,984). Most common causes: arts, culture and humanities (3).
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 |
|---|---|---|---|---|---|---|
| Oak Grove Montessori Elementary School Inc | 501(c)(3) | 1981 | $792,303 | $555,023 | 2025-06 | |
| Brigade of the American Revolution | Arts, culture and humanities | 501(c)(3) | 1970 | $62,984 | $151,414 | 2025-12 |
| Alexander Graham Bell Association for the Deaf-Ct Chapter Inc | Human services | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Bloody Historical | 501(c)(3) | 2021 | $0 | $0 | 2025-12 | |
| His Majesty S 54TH Regiment of Foot Inc | Arts, culture and humanities | 501(c)(3) | 2013 | $0 | $0 | 2025-12 |
| International Association of Fire Fighters | 501(c)(5) | 1959 | $0 | $0 | 2024-09 | |
| Islamic Center of the University of Connecticut | Religion-related | 501(c)(3) | 2001 | |||
| MFC East Conn Chapter | Public and societal benefit | 501(c)(3) | 2024 | $0 | $0 | 2025-12 |
| Miner Bell Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2016 | $1.2 million | 2024-12 | |
| Now Mansfield Inc | Human services | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Soroptimist International of the Americas Inc | Crime and legal-related | 501(c)(3) | 2002 | $0 | $0 | 2025-06 |
| Uconn Thunderaas | Arts, culture and humanities | 501(c)(3) | 2026 |
By cause in Mansfield, CT
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.