Data / Nonprofits / Connecticut / New Haven / Mutual and membership benefit
Mutual and membership benefit nonprofits in New Haven, CT: 12 registered with the IRS
12 mutual and membership benefit nonprofits are registered with the IRS in New Haven, CT, 1 of them 501(c)(3) charities; the 5 that report revenue took in $115.2 million. The largest by revenue: Yale University Retiree Health Benefits Coverage Trust ($114.9 million), Hiram Lodge No 1 Af & Am ($86,320), Lion of CT Incorporated ($84,266).
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Every organization, largest by revenue first
| Organization | Type | Since | Revenue | Assets | Filing |
|---|---|---|---|---|---|
| Yale University Retiree Health Benefits Coverage Trust | 501(c)(3) | 1997 | $114.9 million | $1.24 billion | 2025-06 |
| Hiram Lodge No 1 Af & Am | 501(c)(10) | 2026 | $86,320 | $1.4 million | 2023-12 |
| Lion of CT Incorporated | 501(c)(7) | 2024 | $84,266 | $271 | 2026-05 |
| Trumbull Lodge 22 Af & Am | 501(c)(10) | 2026 | $71,902 | $447,251 | 2025-12 |
| Connecticut Cemetery Association | 501(c)(6) | 2007 | $23,842 | $72,556 | 2025-09 |
| Beth El Keser Israel Cemetery Association Inc | 501(c)(13) | 2012 | $0 | $0 | 2025-06 |
| Edon Club | 501(c)(7) | 2024 | $0 | $0 | 2025-12 |
| Franklin-Halleck Chapter No 2 Royal Arch Masons | 501(c)(10) | 2026 | $0 | $0 | 2026-03 |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-12 |
| Knights of Columbus | 501(c)(8) | 1940 | $0 | $0 | 2025-12 |
| Oriental Lodge No 6 Free & Accepted Masons Prince Hall Incorporated | 501(c)(10) | 2020 | $0 | $0 | 2025-07 |
| Royal and Select Masters of Connect Icut | 501(c)(10) | 2026 | $0 | $0 | 2026-03 |
Other causes in New Haven, CT
- Education 153
- Religion-related 150
- Arts, culture and humanities 109
- Human services 96
- Community improvement and capacity building 55
- Philanthropy, voluntarism and grantmaking foundations 46
- Housing and shelter 41
- Health care 33
- Recreation and sports 32
- Youth development 31
- International, foreign affairs and national security 19
- Environment 17
- Employment 17
- Public and societal benefit 16
- Crime and legal-related 14
- Mental health and crisis intervention 14
- Food, agriculture and nutrition 10
- Science and technology 9
- Civil rights, social action and advocacy 7
- Medical research 5
- Diseases, disorders and medical disciplines 5
- Animal-related 3
- Social science 3
Every nonprofit in New Haven, CT · Mutual and membership benefit nonprofits across the state · 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.