Nonprofits in Massachusetts
44,202 organizations in the IRS master file with a Massachusetts 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 885
IRS master file dated October 13, 2026; loaded here on October 26, 2026.
0–9
- 01255 OUR TOWN CORPEIN 22-2757394SANDISFIELD501(c)(3)
- 1-HOUR PARTY INCEIN 33-1674655BOSTON501(c)(3)
- 1 HOWE 2 TENNIS INCEIN 93-1757203COHASSET501(c)(3)
- 1 SOUND MINISTRIES INTERNATIONALEIN 84-5136520BOYLSTON501(c)(3)
- 10 19 FOUNDATION INCEIN 81-4975769EAST FALMOUTH501(c)(3)
- 10 ELM FOUNDATIONEIN 84-2933724BOXFORD501(c)(3)
- 10000 BRAINS NEURO AI INCEIN 93-1982824CHESTNUT HILL501(c)(3)
- 1001 DIVERSE BOOKS INCEIN 86-1331986SOMERVILLE501(c)(3)
- 100TREESPROJECT INCEIN 39-3862034BOSTON501(c)(3)
- 101 FOUNDATION INCEIN 99-4216172WOBURN501(c)(3)
- 10452 FOUNDATION INCEIN 93-2683502WORCESTER501(c)(3)
- 1060 BELMONT INCEIN 27-1619580NEWTON501(c)(3)
- 107 CHARLES STREET INCNORUMBEGA GROUPEIN 87-3557377AUBURNDALE501(c)(3)
- 108 PEACE INSTITUTE INCEIN 99-0473998BELMONT501(c)(3)
- 11-17 LEOMINSTER ROAD CONDOMINIUM ASSOCIATION TRWILLIAM MCDEVITT TTEEEIN 46-7518102DEDHAM501(c)(4)
- 11 FOUNDATION - IN MEMORY OF MICHAEL MASON INCEIN 45-3482306WINTHROP501(c)(3)
- 110 INCEIN 26-0748247WENHAM501(c)(3)
- THE 1140A CORPORATIONEIN 42-3958752DENNIS501(c)(3)
- 1156 FOUNDATIONAMY L MCCARTHY TTEEEIN 46-6731126CONCORD501(c)(3)
- 121 W CHESTNUT ASSOCIATES INCEIN 95-4826416BOSTON501(c)(25)
- 123 CRAWFORD STREET INCEIN 04-3178329BOSTON501(c)(3)
- 123 UP AND ADAM INCEIN 47-3246638PITTSFIELD501(c)(3)
- 128 WEST TRANSPORTATION COUNCIL INC128 BUSINESS COUNCILEIN 04-2969207WALTHAM501(c)(4)
- 12TH MAN-GO BLUE INCEIN 47-4211798DALTON501(c)(3)
- 12TH REENACTING SOCIETY INCEIN 86-1712475NEW BEDFORD501(c)(3)
- 1324 MASSACHUSETTS AVENUE FOUNDATION INCEIN 99-1486153CAMBRIDGE501(c)(3)
- 14 KENDALL RAE PLACE INCEIN 39-3021541BUZZARDS BAY501(c)(2)
- 14 TAYLOR ROAD INCEIN 39-3119025BUZZARDS BAY501(c)(2)
- 140 ARTS COLLABORATIVEEIN 33-5036094UPTON501(c)(3)
- THE 1434 FOUNDATION INCEIN 47-2480352BOSTON501(c)(3)
- 152 COMMONWEALTH FOUNDATION INCEIN 82-2467536BOSTON501(c)(3)
- 157 ROBOTICSEIN 92-1352542CLINTON501(c)(3)
- 16 LYRICS INCEIN 85-3945903SPRINGFIELD501(c)(3)
- 16 TOWER LANE INCEIN 39-2997176BUZZARDS BAY501(c)(2)
- 1620 SPORTS FOUNDATION INCEIN 41-5080281PLYMOUTH501(c)(3)
- 1638 FUND CHARITABLE TRBRIAN SEAN KANE TTEEEIN 81-6882714BROOKLINE501(c)(3)
- 1717 MEETINGHOUSE FOUNDATION INCEIN 04-6113324W BARNSTABLE501(c)(3)
- 1728 CLUB OF MIDDLETON INCEIN 46-1246774MIDDLETON501(c)(3)
- 1746 DOCK CORPEIN 04-3396383WESTPORT501(c)(7)
- 1780 HCHQ INCEIN 82-5021847SPRINGFIELD501(c)(3)
- 1794 MEETINGHOUSE INCEIN 04-2947060NEW SALEM501(c)(3)
- 17THHOUSE FOUNDATION17TH HOUSE FOUNDATIONEIN 33-2545900BOSTON501(c)(3)
- 18 DEGREES INCEIN 04-2226238PITTSFIELD501(c)(3)
- 180 FRANKLIN EDUCATION ASSOCIATIONEIN 04-2601100FRANKLIN501(c)(5)
- 1882 HOUSE FOUNDATION INCEIN 99-0545183CHESTNUT HILL501(c)(3)
- 1921 HISTORIC PRESERVATION FUND INCEIN 99-4993026LEOMINSTER501(c)(3)
- 1997 JOHN AND MARY MURPHY EDUCATIONAL FOUNDATIONEIN 04-3399061WINCHESTER501(c)(3)
- 1BERKSHIRE STRATEGIC ALLIANCE INCEIN 27-3148082PITTSFIELD501(c)(6)
- 1BERKSHIRE STRATEGIC ALLIANCE FOUNDATION INCEIN 27-3145760PITTSFIELD501(c)(3)
- 1EDTECH CONSORTIUM INCEIN 04-3489277BURLINGTON501(c)(6)
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.