Nonprofits in Massachusetts
Nonprofits in Massachusetts. Browse 52,168 public nonprofit profiles. Review organization identities, available filing years, and their complete CharitySense profiles.
Location refers to headquarters recorded in public sources, not an organization’s service area. Classification describes its reported category and does not assess its effectiveness.
Nonprofit profiles
- Ong Sentinelles De Leternel Carribean Humanitarian Relief Sdl
EIN 392210544 · Headquarters: Norwood, MA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- ONL Association For Nursing Leadership Science and Education Inc
EIN 364744413 · Headquarters: Whitinsville, MA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990
- Online Learning Consortium Inc
EIN 261970287 · Headquarters: Boston, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- Only a Child Inc
EIN 043467651 · Headquarters: JAMAICA PLAIN, MA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Onset Bay Association Inc
EIN 043160060 · Headquarters: ONSET, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Onset Beach Jazz Festival Inc
EIN 473521331 · Headquarters: ONSET, MA, US · Arts, Culture & Humanities · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Onset Campgrounds Community Associa Tion Inc
EIN 394007024 · Headquarters: Onset, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Onset Cape Verdean Festival Association
EIN 043762168 · Headquarters: ONSET, MA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Onset Community Crime Watch Inc
EIN 201628467 · Headquarters: Onset, MA, US · Crime & Legal Related · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- Onset Youth Center Inc
EIN 043401097 · Headquarters: ONSET, MA, US · Youth Development · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- OnStage Dance Company
EIN 273908546 · Headquarters: Malden, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Ontic Initiative Ltd
EIN 932286403 · Headquarters: FALMOUTH, MA, USA · Housing & Shelter · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Onyx Black Wealth Collective Inc
EIN 932499015 · Headquarters: Cambridge, MA, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opeiu Local 6 Trial Court of Massachusetts Health & Welfare Fund
EIN 222582112 · Headquarters: BRAINTREE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Agriculture Foundation
EIN 811516540 · Headquarters: MARBLEHEAD, MA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2019 · Primary form: IRS Form 990
- Open Arms Rescue Inc
EIN 352392760 · Headquarters: Westfield, MA, USA · Animal Related · Latest available filing year: 2017 · Primary form: IRS Form 990-EZ
- Open Avenues Foundation
EIN 822344731 · Headquarters: BOSTON, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Biobank Inc
EIN 920868501 · Headquarters: Somerville, MA, US · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Open Books Foundation Co
EIN 800251597 · Headquarters: HOPKINTON, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Church Foundation
EIN 042108377 · Headquarters: WELLESLEY HILLS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Open Circle Alliance Inc
EIN 993507374 · Headquarters: Pittsfield, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Open Copyright Education Advisory Network Inc
EIN 931565901 · Headquarters: Truro, MA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Open Design Iinstitute Inc
EIN 412494764 · Headquarters: AMHERST, MA, US · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Door Community Tabernacle
EIN 760701875 · Headquarters: Tewksbury, MA, USA · Religion Related · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ
- Open Door Ensembles of Boston
EIN 933501257 · Headquarters: Watertown, MA, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Open Door Free Medical Program Inc
EIN 204422745 · Headquarters: Hudson, MA, US · Health Care · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- Open Door Immigration Services Inc
EIN 474958773 · Headquarters: Beverly, MA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Open Door Inc
EIN 043082827 · Headquarters: Mashpee, MA, US · Youth Development · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- Open Door Theatre of Acton Inc
EIN 042785919 · Headquarters: Acton, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Open Doors Classroom for the Universal Course
EIN 043309207 · Headquarters: DEDHAM, MA, USA · Crime & Legal Related · Latest available filing year: 2017 · Primary form: IRS Form 990-EZ
- Open Doorway of Cape Cod
EIN 473755121 · Headquarters: North Eastham, MA, US · Mental Health & Crisis Intervention · Latest available filing year: 2015 · Primary form: IRS Form 990-N
- Open Education Global Incorporated
EIN 010908761 · Headquarters: CONCORD, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Field Foundation Inc
EIN 043313646 · Headquarters: AMHERST, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Open Fields Inc
EIN 043517955 · Headquarters: DOVER, MA, USA · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Open Hands Foundation Inc
EIN 134217419 · Headquarters: Boston, MA, US · Human Services · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- Open Health Imaging Foundation
EIN 472278834 · Headquarters: STOW, MA, USA · Health Care · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ
- Open Hearth Inc
EIN 200704704 · Headquarters: Maynard, MA, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- Open Hearts Ministries Inc
EIN 550881163 · Headquarters: HAVERHILL, MA, USA · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Open Ichurch Incorporated
EIN 463104181 · Headquarters: Weston, MA, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Inc
EIN 043143978 · Headquarters: Chestnut Hill, MA, US · Public & Societal Benefit · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- Open Knowledge Commons Inc
EIN 263463867 · Headquarters: CAMBRIDGE, MA, USA · Education · Latest available filing year: 2012 · Primary form: IRS Form 990
- Open Learning Exchange Inc
EIN 260211816 · Headquarters: CAMBRIDGE, MA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Open Mic Classical
EIN 822321023 · Headquarters: Brewster, MA, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Open Mind Foundation
EIN 522293872 · Headquarters: CUMMINGTON, MA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Open Music Collective Ltd
EIN 900494786 · Headquarters: Greenfield, MA, US · Arts, Culture & Humanities · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- Open Orchestra Inc
EIN 992692170 · Headquarters: Boston, MA, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Open Pantry Community Services Inc
EIN 521084599 · Headquarters: SPRINGFIELD, MA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Road Foundation Inc
EIN 821940219 · Headquarters: Lawrence, MA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Open Run Inc
EIN 831816451 · Headquarters: boston, MA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open Shelves Food Pantry
EIN 261830315 · Headquarters: BERKLEY, MA, USA · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Open Sky Community Services
EIN 042587863 · Headquarters: Worcester, MA, United States · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Source Media Inc
EIN 202233057 · Headquarters: CAMBRIDGE, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Table Inc
EIN 043048933 · Headquarters: CONCORD, MA, USA · Food, Agriculture & Nutrition · Latest available filing year: 2024 · Primary form: IRS Form 990
- Open Theatre Inc
EIN 800744749 · Headquarters: Walpole, MA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Open University of Wellfleet Inc
EIN 812625079 · Headquarters: SOUTH WELLFLEET, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Open View Farm Educational Center Inc
EIN 203739573 · Headquarters: Conway, MA, US · Arts, Culture & Humanities · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- Openacc-standard Org
EIN 454132223 · Headquarters: Cambridge, MA, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Openair Theater Inc
EIN 040821787 · Headquarters: Somerville, MA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Openbiome Foundation Inc
EIN 461681862 · Headquarters: WESTPORT, MA, USA · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990
- Openboxscienceinc
EIN 871218147 · Headquarters: Cambridge, MA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Opencape Corporation
EIN 208670761 · Headquarters: BARNSTABLE, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990
- Openculture Foundation Inc
EIN 043524875 · Headquarters: Somerville, MA, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- Opengate Inn Inc C/o Mark Germagian
EIN 833865388 · Headquarters: HARVARD, MA, USA · Mutual & Membership Benefit · Latest available filing year: 2019 · Primary form: IRS Form 990-PF
- Opening Gaits Therapeutic Riding Center Inc
EIN 204675798 · Headquarters: GILL, MA, USA · Human Services · Latest available filing year: 2014 · Primary form: IRS Form 990-EZ
- Opening the Word Peer Recovery Center
EIN 843775230 · Headquarters: Webster, MA, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Openmainframe Inc
EIN 272537019 · Headquarters: Boxford, MA, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- Openreview Foundation
EIN 994025250 · Headquarters: NEWTON HIGHLANDS, MA, USA · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990
- Opensailing Inc
EIN 990858023 · Headquarters: BOSTON, MA, USA · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990-PF
- Opera Aperta Inc
EIN 043450574 · Headquarters: Weston, MA, US · Arts, Culture & Humanities · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- Opera Boston Inc C/o Gregory Bulger
EIN 042756974 · Headquarters: WEST NEWTON, MA, US · Arts, Culture & Humanities · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- OPERA CAMBRIDGE INC Formally Cambridge Chamber Ensemble Inc
EIN 352695331 · Headquarters: Cambridge, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Opera Del West Inc
EIN 204040660 · Headquarters: East Falmouth, MA, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Opera New England of Cape Cod
EIN 042621713 · Headquarters: MARSTONS MILLS, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ
- Operating Engineers Local 4 Building Holding Corp
EIN 851702740 · Headquarters: MEDWAY, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operating Engineers Local 4 Charitable Foundation Inc
EIN 824664499 · Headquarters: MEDWAY, MA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operation ABLE of Greater Boston
EIN 042761871 · Headquarters: Boston, MA, USA · Employment · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operation Adopt a Soldier
EIN 461981551 · Headquarters: Randolph, MA, USA · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Operation American Soldier Inc
EIN 260857354 · Headquarters: WATERTOWN, MA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Operation Comix Relief Inc
EIN 200633571 · Headquarters: FRAMINGHAM, MA, USA · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Operation Dance - Friends of Kc Dance Company
EIN 821827428 · Headquarters: Middleboro, MA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Elf
EIN 271172184 · Headquarters: Andover, MA, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Operation Friendship of America Inc
EIN 042577160 · Headquarters: Palmer, MA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- Operation Gloves with Love
EIN 815221502 · Headquarters: Boston, MA, US · Human Services · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- Operation Graduation Bellingham High School
EIN 043287487 · Headquarters: Bellingham, MA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- Operation Hammond First Response Inc
EIN 455007706 · Headquarters: Andover, MA, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Healthy Smile Inc
EIN 412120646 · Headquarters: MARLBOROUGH, MA, USA · Health Care · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ
- Operation Help Now
EIN 800370379 · Headquarters: Boston, MA, US · International, Foreign Affairs & National Security · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- Operation Hypify Inc
EIN 993506874 · Headquarters: Hopkinton, MA, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Italy Christian Mission Incorporated
EIN 222591811 · Headquarters: MEDFORD, MA, US · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Mordechai Inc
EIN 881217010 · Headquarters: NEEDHAM, MA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-PF
- Operation Nehemiah Missions International Inc
EIN 223270284 · Headquarters: LANESBORO, MA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2023 · Primary form: IRS Form 990
- Operation Outreach-USA Inc
EIN 043368610 · Headquarters: Holliston, MA, US · Arts, Culture & Humanities · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- Operation Paperback Inc
EIN 412209836 · Headquarters: Dunstable, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Peace Northeast Inc
EIN 043558709 · Headquarters: NEWTON, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- Operation Peaceful Warrior
EIN 464126231 · Headquarters: Norton, MA, US · Housing & Shelter · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- Operation Service Inc
EIN 820597234 · Headquarters: FITCHBURG, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- Operation Shade Tree
EIN 842985892 · Headquarters: Boston, MA, US · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- Operation Small Steps
EIN 462738802 · Headquarters: SEEKONK, MA, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- Operation Suitcase Inc
EIN 463962876 · Headquarters: Northbridge, MA, US · Arts, Culture & Humanities · Latest available filing year: 2016 · Primary form: IRS Form 990-N
- Operation Troop Support Inc
EIN 208645838 · Headquarters: Danvers, MA, USA · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ