| Greater Hartford Gives FoundationHartford | Form 990 | $144,403,277FY2024 |
| Charityvest IncFairfield | Form 990 | $113,380,722FY2024 |
| Ithuriel FundOld Greenwich | Form 990 | $102,328,070FY2025 |
| Knights of Columbus Charitable Fund IncNew Haven | Form 990 | $85,542,892FY2024 |
| Community Foundation for Greater New HavenNew Haven | Form 990 | $55,709,123FY2024 |
| National Charitable Endowment IncDarien | Form 990 | $55,181,131FY2024 |
| Greater Hartford Community Foundation IncHartford | Form 990 | $42,886,197FY2025 |
| United Way of ConnecticutRocky Hill | Form 990 | $36,919,209FY2025 |
| Deloitte FoundationStamford | Form 990 | $27,976,264FY2025 |
| Fairfield Countys Community Foundation IncNorwalk | Form 990 | $21,278,159FY2025 |
| Person to Person IncDarien | Form 990 | $17,494,259FY2025 |
| Foundations in Education IncShelton | Form 990 | $17,351,326FY2025 |
| Jewish Community Foundation of Greater Hartford IncWest Hartford | Form 990 | $17,161,117FY2025 |
| Connecticut Community Foundation IncWaterbury | Form 990 | $15,175,996FY2025 |
| United Way of Greater New Haven IncNew Haven | Form 990 | $14,943,217FY2025 |
| Community Foundation of Eastern ConnecticutNew London | Form 990 | $13,055,357FY2024 |
| Jewish Federation of Greater HartfordWest Hartford | Form 990 | $11,870,021FY2025 |
| United Way Inc Dba United Way of Central & Northeastern CTHartford | Form 990 | $10,694,086FY2025 |
| Northwest Connecticut Community Foundation IncTorrington | Form 990 | $10,428,125FY2025 |
| New Canaan Community Foundation IncNew Canaan | Form 990 | $9,847,106FY2025 |
| United Way of Coastal and Western Connecticut IncDanbury | Form 990 | $8,038,028FY2025 |
| Main Street Community FoundationBristol | Form 990 | $7,839,262FY2025 |
| Hometown Foundation IncCheshire | Form 990 | $7,402,037FY2025 |
| North Central Area Agency on Aging IncHartford | Form 990 | $7,075,995FY2025 |
| Lyford Cay Foundation IncGreenwich | Form 990 | $7,036,988FY2024 |
| Yhb Charitable Endowment IncWest Hartford | Form 990 | $6,807,781FY2024 |
| Maria Seymour Brooker Memorial IncTorrington | Form 990 | $5,279,932FY2025 |
| Alliance for Cancer Gene Therapy IncStamford | Form 990 | $5,167,910FY2026 |
| Community Foundation of Middlesex County IncMiddletown | Form 990 | $4,679,373FY2025 |
| Nfa Foundation IncNorwich | Form 990 | $4,600,603FY2025 |
| Monks of Norcia FoundationNorwalk | Form 990 | $4,261,531FY2025 |
| Valley Community Foundation IncNew Haven | Form 990 | $3,332,289FY2024 |
| Pink Aid IncWestport | Form 990 | $3,187,352FY2025 |
| American Friends of Le Korsa IncBethany | Form 990 | $3,004,925FY2024 |
| Easton Community Center IncEaston | Form 990 | $2,301,246FY2025 |
| John T and Jane a Wiederhold FoundationTorrington | Form 990 | $2,251,557FY2025 |
| Electric Boat Employees Community Service AssociationGroton | Form 990 | $1,827,070FY2025 |
| Stryke Foundation for Rare Disease Research and TreatmentNorwalk | Form 990 | $1,804,272FY2024 |
| Catherine Violet Hubbard Foundation IncNewtown | Form 990 | $1,656,808FY2024 |
| Connecticut Council for PhilanthropyHartford | Form 990 | $1,623,741FY2024 |
| Klein Memorial Auditorium Foundation IncBridgeport | Form 990 | $1,614,997FY2026 |
| United Compassion Fund IncStamford | Form 990 | $1,509,634FY2024 |
| Suzuki Music School of Westport IncWestport | Form 990 | $1,371,011FY2025 |
| The Community Fund of DarienDarien | Form 990 | $1,298,661FY2025 |
| Generous Life IncRidgefield | Form 990 | $1,258,828FY2024 |
| American Friends of Kishorit IncWest Hartford | Form 990 | $1,175,288FY2025 |
| Catalytic Impact Foundation IncWestport | Form 990 | $1,102,424FY2024 |
| Stamford Public Education Foundation IncStamford | Form 990 | $1,077,200FY2025 |
| Simsbury Performing Arts Center IncSimsbury | Form 990 | $1,006,489FY2025 |
| Lawyers for Children America IncHartford | Form 990 | $985,005FY2025 |