Nonprofits in Connecticut
23,749 organizations in the IRS master file with a Connecticut address, listed A to Z by name.
Public IRS records only
This list comes from the IRS master file, which anyone can download from irs.gov. Nothing on it comes from Fast File Exempt accounts or filings. We run this lookup; it isn’t an IRS service. About this data
All organizations, page 1 of 475
IRS master file dated October 13, 2026; loaded here on October 26, 2026.
0–9
- 06880 INCEIN 37-2000587WESTPORT501(c)(3)
- THE 095 WINDSOR YOUTH FOUNDATIONEIN 93-4844510BLOOMFIELD501(c)(3)
- 1 FREEDOM FOR ALLEIN 82-3270255DANBURY501(c)(3)
- 100-106 MAIN STREET HOLDING INCEIN 93-4741818NEW BRITAIN501(c)(3)
- 100 BLACK MEN OF STAMFORD INCEIN 06-1367429STAMFORD501(c)(3)
- 10000 HAWKS INCEIN 93-1498175NEW HAVEN501(c)(3)
- 100GIRLSLEADINGEIN 84-4191153BRIDGEPORT501(c)(3)
- 101 ASSOCIATION INCEIN 22-2553725TORRINGTON501(c)(7)
- 102D INFANTRY REGIMENT ASSOCIATION INCEIN 06-1465130DANBURY501(c)(19)
- 102ND INFANTRY REGIMENT MUSEUM INCEIN 06-1354580WEST HAVEN501(c)(3)
- 12 SQUARE FEET YOGA INCORPORATEDEIN 39-2329059SANDY HOOK501(c)(3)
- 12 WESTMAIN ST TRUSTEESEIN 06-6263169AVON501(c)(2)
- 12345 KIDS COUNT OF MILFORD INCEIN 06-1411387MILFORD501(c)(3)
- 12M YACHT DEVELOPMENT FOUNDATION INCSIKORSKI PATRIK TTEEEIN 06-6409216SOUTHPORT501(c)(3)
- 130 HOWE STREET INCEIN 06-1605510NEW HAVEN501(c)(3)
- 1533 STATE ST INCEIN 06-1535382HAMDEN501(c)(7)
- 1636 HERITAGE PARTNERSHIP INCEIN 83-3771810HARTFORD501(c)(3)
- 165 MAIN STREET INCEIN 06-0742617SEYMOUR501(c)(3)
- 1746 MACHINIST CLUBEIN 06-0733684EAST HARTFORD501(c)(7)
- 1768 FOUNDATIONEIN 88-3838423WESTON501(c)(3)
- 1772 FOUNDATION INCEIN 22-2578377POMFRET CTR501(c)(3)
- THE 180 CENTER CORPEIN 80-0642741NEW HAVEN501(c)(3)
- 180 LIFE CHURCH INCEIN 20-2392011WEST HARTFORD501(c)(3)
- 180 LIFE CHURCHEIN 88-3557131WEST HARTFORD501(c)(3)
- 182 COMMUNITY AND SERVICE FOUNDATIO N INC182 FOUNDATIONEIN 41-4433739WEST GRANBY501(c)(3)
- 1892 CLUB INCEIN 06-1622806HARTFORD501(c)(7)
- 1898 FOUNDATION INCEIN 93-3078611HAMDEN501(c)(3)
- 1947 TOWNSEND STREET INCORPORATEDEIN 87-1447604NEW HAVEN501(c)(3)
- 1DROP RELIEF FOUNDATION CORPEIN 87-1531905COLCHESTER501(c)(3)
- 1ST CHURCH OF CHRIST IN MANSFIELDEIN 06-0724262MANSFIELD CTR501(c)(3)
- 1ST CONGREGATIONAL CHURCH OF BARKHAMSTEDEIN 06-0973813BARKHAMSTED501(c)(3)
- 2-4-1 CAREEIN 87-4014880HARTFORD501(c)(3)
- 2 FEET 4 GOODEIN 85-2548794ENFIELD501(c)(3)
- 2 MOMS ON A MISSION INCEIN 46-1041408ENFIELD501(c)(3)
- 203 SQUASH ASSOCIATION INCEIN 82-3925408WESTPORT501(c)(3)
- 20TH CENTURY TRENDS INSTITUTE INCEIN 06-6098560STAMFORD501(c)(3)
- 21ST CENTURY FUND FOR HVRHS INC21ST CENTURY FUNDEIN 46-3683577FALLS VILLAGE501(c)(3)
- 21ST CENTURY TOLLAND FUND INCEIN 82-2714244WINDSOR501(c)(3)
- 261 FEARLESS CLUB CONNECTICUTEIN 83-1607799WETHERSFIELD501(c)(3)
- 290 POST ROAD WEST CORP INCEIN 06-1318049WESTPORT501(c)(2)
- 2F FILMS INCORPORATEDEIN 93-3701336HADDAM NECK501(c)(3)
- 2ND CONNECTICUT VOLUNTEER HEAVY ARTILLERYEIN 06-1481431WOODBURY501(c)(3)
- 2NDGO INCEIN 85-1834582HAWLEYVILLE501(c)(3)
- 3 2 1 LEARN INCEIN 88-2933091GLASTONBURY501(c)(3)
- 3-33 GROUP INCEIN 06-1591563DERBY501(c)(3)
- 300 SHULEIN 93-4717086NEW HAVEN501(c)(3)
- 32 SPORTS INCEIN 92-0595125MANCHESTER501(c)(3)
- 330 NORTH BRAND INCEIN 20-0521721HARTFORD501(c)(25)
- 333 VALLEY STREET CENTER- AN INTERGENERATIONAL ORGANIZATION INCEIN 85-2606807NEW HAVEN501(c)(3)
- 35 HIGH ST HOUSE CORPORATIONEIN 06-1448927NEW HAVEN501(c)(2)
Guides
- Form 990-N, 990-EZ or 990: which to fileThe three tests, what "normally $50,000" means, who must file Form 990 regardless, and who doesn't file at all.
- Form 990 for PTAs, PTOs and booster clubsWhether a unit under a state group exemption files its own return, which form, the July–June deadline, and the treasurer handover.
- Private foundation filing requirementsForm 990-PF, its deadline and extension, and the separate returns a foundation may owe.
- Who can file Form 990-NThe "normally $50,000 or less" test, what the e-Postcard asks for, and when it's due.
- Form 990-N filing problemsEIN not in IRS records, IRS sign-in, filing too early, late and prior-year notices, and checking a past filing.
- Form 990 filing deadlinesThe general due date for each tax-year end, and how weekends and holidays move it.
- Form 8868 extensionsWhen Form 8868 extends an annual return, and why tax is still due on the original date.
- Late filing penaltiesThe daily penalty for a late return, reasonable cause, and the three-year revocation rule.