| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $7.7 million | $13.7 million | 2024-12 |
| Aaaa Scholarship Foundation Inc | Education | 501(c)(3) | 1968 | $1.9 million | $10.7 million | 2025-09 |
| International Brotherhood of Electrical Workers | | 501(c)(5) | 1940 | $1.9 million | $992,390 | 2025-12 |
| Connecticut Polar Bears W H C Inc | | 501(c)(3) | 1991 | $775,370 | $984,472 | 2025-08 |
| L U No 488 Ibew Joint Apprenticeship Training Fund | Employment | 501(c)(5) | 1978 | $693,194 | $1.4 million | 2025-12 |
| Fairfield County Fish & Game Protective Association Inc | Recreation and sports | 501(c)(7) | 1940 | $646,620 | $2.2 million | 2025-12 |
| Two Coyotes Wilderness School Inc | Education | 501(c)(3) | 2000 | $626,955 | $124,912 | 2024-12 |
| Washington Association of Maintenance and Operations Adminis | | 501(c)(6) | 1984 | $592,683 | $389,515 | 2025-12 |
| Monroe Soccer Club Inc | Recreation and sports | 501(c)(3) | 1993 | $408,152 | $201,084 | 2024-12 |
| Monroe Vol Fire Dept No 1 Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 1996 | $359,135 | $904,514 | 2025-06 |
| Bridgeport Police Union Local 1159 | Crime and legal-related | 501(c)(5) | 2024 | $353,205 | $261,500 | 2020-12 |
| Stepney Volunteer Fire Company No 1 Inc | | 501(c)(4) | 1936 | $342,337 | $478,618 | 2025-06 |
| Local Union 488 Ibew Building Corporation | Community improvement and capacity building | 501(c)(2) | 2010 | $211,292 | $5.5 million | 2025-12 |
| Stevenson Volunteer Fire Company Inc | Public safety, disaster preparedness and relief | 501(c)(3) | 1954 | $196,374 | $368,330 | 2025-12 |
| Saugatuck Shores Club Inc | | 501(c)(7) | 1993 | $180,690 | $2.2 million | 2025-12 |
| Little League Baseball Inc | | 501(c)(3) | 1967 | $179,515 | $449,232 | 2025-09 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $163,722 | $129,539 | 2024-12 |
| Estonian American National Council Inc | International, foreign affairs and national security | 501(c)(3) | 1989 | $158,258 | $3.4 million | 2024-12 |
| Hooks for Heroes Connecticut Inc | Public and societal benefit | 501(c)(3) | 2021 | $144,320 | $144,320 | 2025-12 |
| Aaaa Trade School Licensing and Certification Support Foundation I | Education | 501(c)(3) | 2021 | $141,373 | $221,808 | 2024-12 |
| Islamic Community of Fairfield County | | 501(c)(3) | 1976 | $140,683 | $119,394 | 2025-12 |
| American Youth Football Inc | Recreation and sports | 501(c)(3) | 2005 | $104,891 | $45,129 | 2025-03 |
| International Plant Propagators | | 501(c)(5) | 1974 | $102,011 | $449,889 | 2024-12 |
| Fawn Hollow Parent Teacher Organization Inc | | 501(c)(3) | 1980 | $101,546 | $114,002 | 2025-06 |
| American Federation of State County & Municipal Employees | | 501(c)(5) | 1957 | $100,568 | $167,778 | 2025-12 |
| Monroe Lacrosse Association Inc | Recreation and sports | 501(c)(3) | 2011 | $98,021 | $94,332 | 2025-12 |
| American Legion | | 501(c)(19) | 1946 | $76,625 | $398,977 | 2024-12 |
| Whitney Farms Mens Club Inc | Recreation and sports | 501(c)(7) | 2021 | $75,633 | $2,268 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1972 | $71,248 | $19,846 | 2024-12 |
| Connecticut Interscholastic Ski League LTD | Recreation and sports | 501(c)(3) | 1997 | $62,290 | $134,408 | 2025-08 |
| Connecticut Building Congress Scholarship Fund | Education | 501(c)(3) | 2012 | $58,878 | $166,341 | 2025-06 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $55,852 | $70,629 | 2024-12 |
| Youth Education & Sports Community Inc | Youth development | 501(c)(3) | 2021 | $54,029 | $29,588 | 2024-12 |
| Stepney Parent-Teachers Organization Inc | Education | 501(c)(3) | 2016 | $48,615 | $71,907 | 2025-06 |
| Fine Arts Radio Inc | | 501(c)(3) | 1994 | $47,421 | $511,441 | 2023-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $45,952 | $77,628 | 2024-12 |
| India 600 | Religion-related | 501(c)(3) | 2017 | $44,693 | $67,573 | 2024-12 |
| Strike 3 Foundation | Medical research | 501(c)(3) | 2008 | $44,031 | $905,491 | 2025-12 |
| Hundred Year Association of New York Inc | Community improvement and capacity building | 501(c)(3) | 1993 | $43,160 | $167,388 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $42,099 | $49,814 | 2024-12 |
| Monroe Little Lions Cheerleading Inc | | 501(c)(3) | 2022 | $34,164 | $28,798 | 2025-03 |
| International Brotherhood of Electrical Workers Local 488 Chari | Recreation and sports | 501(c)(3) | 2024 | $23,435 | $89,160 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $21,089 | $62,918 | 2024-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $20,815 | $8,028 | 2024-12 |
| Monroe Middle School Pto | | 501(c)(3) | 1984 | $14,302 | $8,888 | 2025-06 |
| Ancient Free & Accepted Masons of Conneticut | | 501(c)(10) | 1943 | $10,865 | $4,677 | 2025-11 |
| Jih Rong Temple Corp | Religion-related | 501(c)(3) | 2024 | $4,014 | $1.5 million | 2024-12 |
| Monroe Playground Foundation Inc | Recreation and sports | 501(c)(3) | 2018 | $516 | $3,476 | 2024-12 |
| Fighting Angels Foundation Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2015 | $9 | $62,509 | 2025-09 |
| American Federation of Labor & Congress of Industrial Orgs | | 501(c)(5) | 1956 | $0 | $0 | 2025-12 |
| American Legion | | 501(c)(19) | 1946 | $0 | $0 | 2025-12 |
| Army Aviation Association of | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(5) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2024-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1972 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2024-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | | | |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1967 | $0 | $0 | 2025-12 |
| Army Aviation Association of America Inc | | 501(c)(4) | 1960 | $0 | $0 | 2025-12 |
| Bahais of Monroe Town | | 501(c)(3) | 1995 | | | |
| CT Ballers United Inc | Recreation and sports | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| CT State Assembly of Ast | Community improvement and capacity building | 501(c)(6) | 2005 | $0 | $0 | 2025-12 |
| Champions for Colorectal Cancer | Health care | 501(c)(3) | 2021 | $0 | $0 | 2025-12 |
| Christ the Way Ministries International Inc | Religion-related | 501(c)(3) | 2007 | | | |
| Columbiettes Incorporated | | 501(c)(10) | 1977 | $0 | $0 | 2025-12 |
| Committee To Save Cooper Union | Civil rights, social action and advocacy | 501(c)(3) | 2015 | $0 | $0 | 2025-12 |
| Company of Jesus and Mary | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2025 | $0 | $0 | 2025-10 |
| Connecticut Junior Women Inc | | 501(c)(3) | 1993 | $0 | $0 | 2026-05 |
| Connecticut Junior Women Inc | | 501(c)(3) | 1993 | $0 | $0 | 2026-05 |
| Connecticut Piecemakers Quilt Guild | Arts, culture and humanities | 501(c)(3) | 1998 | $0 | $0 | 2026-06 |
| Fraternal Order of Police | | 501(c)(8) | 1952 | $0 | $0 | 2026-06 |
| Friends of the Edith Wheeler Memorial Library | Education | 501(c)(3) | 1996 | $0 | $0 | 2025-05 |
| Gift of Soccer C F Inc | Recreation and sports | 501(c)(3) | 2024 | $0 | $0 | 2026-01 |
| Girls Who Arbitrate | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Golds Dragoons 1660 Inc | Recreation and sports | 501(c)(7) | 2019 | $0 | $0 | 2025-12 |
| Help Afgan Children Corp | Human services | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Infinite Possibilities Inc | Human services | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| International Association of Lions Clubs | | 501(c)(4) | 1940 | $0 | $0 | 2025-06 |
| Irelands Great Hunger Museum of Fairfield Inc | Arts, culture and humanities | 501(c)(3) | 2022 | $0 | $0 | 2024-12 |
| Joshua Bent Memorial Scholarship Fund Inc | Education | 501(c)(3) | 2019 | $0 | $0 | 2025-12 |
| Knights of Columbus | | 501(c)(8) | 1940 | $0 | $0 | 2025-12 |
| Legacy Helpers Foundation | Religion-related | 501(c)(3) | 2026 | $0 | $0 | 2025-12 |
| Lotus Light Mission | Youth development | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| MGLBC Supporters Inc | Recreation and sports | 501(c)(3) | 2018 | $0 | $0 | 2024-12 |
| Margery Jones Trust | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2010 | | $129,708 | 2024-09 |
| Mary Ellen Hames-Dellacato Scholarship Foundation | Education | 501(c)(3) | 2005 | $0 | $0 | 2025-12 |
| Masuk All Sports Booster Club | Education | 501(c)(3) | 2011 | $0 | $0 | 2026-06 |
| Masuk Athletic Hall of Fame Inc | Education | 501(c)(3) | 2024 | $0 | $0 | 2025-06 |
| Masuk Football Club | Education | 501(c)(3) | 2018 | $0 | $0 | 2026-06 |
| Masuk High School Robotics Team Inc | Education | 501(c)(3) | 2013 | $0 | $0 | 2025-06 |
| Masuk Ice Hockey Parents Club | Recreation and sports | 501(c)(3) | 2009 | $0 | $0 | 2024-08 |
| Masuk Parent-Teacher Club Inc | Education | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Metropolitan Underwriting Discussion Group Inc | Mutual and membership benefit | 501(c)(6) | 1999 | $0 | $134,245 | 2025-04 |
| Monroe Chamber of Commerce Inc | | 501(c)(6) | 1977 | $0 | $0 | 2024-12 |
| Monroe Elementary Parent Teacher Organization Inc | | 501(c)(3) | 1982 | $0 | $0 | 2025-06 |
| Monroe First Foundation Inc | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2019 | $0 | $0 | 2024-12 |
| Monroe Historical Society Incorporated | Arts, culture and humanities | 501(c)(3) | 1964 | $0 | $0 | 2025-12 |
| Monroe Land Trust and Tree Conservancy Inc | Environment | 501(c)(3) | 2014 | $0 | $0 | 2023-04 |
| Monroe Lions Charities Inc | Human services | 501(c)(3) | 2011 | $0 | $0 | 2025-06 |
| Monroe Public School Parents Council Inc | Education | 501(c)(3) | 2014 | $0 | $0 | 2025-06 |
| Monroe Scholarship Fund Inc | Education | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Monroe Summer Orchestra Inc | Arts, culture and humanities | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Next Robotics Corporation | Education | 501(c)(3) | 2025 | $0 | $0 | 2025-12 |
| Order of the Eastern Star Inc of Connecticut | | 501(c)(8) | 1941 | $0 | $0 | 2026-02 |
| Orthodox Roman Catholic Movement | Religion-related | 501(c)(3) | 1973 | | | |
| Parent Teacher Association of Connecticut Inc | | 501(c)(3) | 1955 | $0 | $0 | 2025-06 |
| Power Play Club Inc | Recreation and sports | 501(c)(3) | 2020 | $0 | $0 | 2026-06 |
| Project Sunshine Inc | Human services | 501(c)(3) | 2025 | $0 | $0 | 2025-02 |
| Reformation Fellowship | | 501(c)(3) | 1978 | | | |
| Resources in Search and Rescue Inc | Animal-related | 501(c)(3) | 2014 | $0 | $0 | 2025-12 |
| Rotary International | | 501(c)(4) | 1942 | $0 | $0 | 2025-06 |
| Save Our Stepney Task Force Incorporated | Environment | 501(c)(3) | 2003 | $0 | $0 | 2025-12 |
| Socialite Lighting Systems Inc | Community improvement and capacity building | 501(c)(3) | 2017 | $0 | $0 | 2025-12 |
| Stepney Baptist Church Inc | | 501(c)(3) | 1955 | | | |
| The Monroe Newcomers & Neighbors Club Inc | | 501(c)(4) | 1998 | $0 | $0 | 2025-06 |
| The St Jude Roman Catholic Church Corporation | | 501(c)(3) | 1946 | | | 2014-06 |
| Think Pink Monroe Inc | Diseases, disorders and medical disciplines | 501(c)(3) | 2022 | $0 | $0 | 2025-12 |
| Timeline International | Education | 501(c)(3) | 2010 | $0 | $0 | 2025-12 |
| Toastmasters International | | 501(c)(3) | 1945 | $0 | $0 | 2025-12 |
| Toastmasters International | Recreation and sports | 501(c)(3) | 1945 | $0 | $0 | 2025-12 |
| Tricoastal Foundation | Philanthropy, voluntarism and grantmaking foundations | 501(c)(3) | 2011 | | $7.4 million | 2025-12 |
| Webb Mountain Discovery Zone Incorporated | Environment | 501(c)(3) | 2020 | $0 | $0 | 2025-12 |