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
- International Institute of Greater Lawrence Inc
EIN 042104326 · Headquarters: LAWRENCE, MA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Institute of Lowell Inc
EIN 042104330 · Headquarters: LOWELL MA, MA, USA · Human Services · Latest available filing year: 2010 · Primary form: IRS Form 990-EZ
- International Institute of New England
EIN 042104325 · Headquarters: Boston, MA, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2023 · Primary form: IRS Form 990
- International Isotope Society Inc
EIN 222845329 · Headquarters: HOLLISTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- International Knowledge Center Inc
EIN 814392752 · Headquarters: WOBURN, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ
- International Laborers Union of North America - Local 175 Afl-cio
EIN 041691878 · Headquarters: METHUEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- International Language Institute of Massachusetts Inc
EIN 222553803 · Headquarters: NORTHAMPTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Language Solutionsin
EIN 474077927 · Headquarters: S DENNIS, MA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ
- International Life Cast Museum Inc
EIN 262688374 · Headquarters: ARLINGTON, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- International Live Events Association Inc
EIN 043182445 · Headquarters: BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- International Longshoremens Association
EIN 046122313 · Headquarters: Boston, MA, US · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Longshoremens Association
EIN 046144065 · Headquarters: Everett, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Longshoremens Local 1066 C/o Marykay Tkachuk
EIN 041896535 · Headquarters: STONEHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- International Longshoremens Union Local 799
EIN 041685575 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- International Macrobiotic Endowment Fund
EIN 263384078 · Headquarters: Becket, MA, US · Health Care · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- International Medical Equip Coll of America
EIN 020489746 · Headquarters: NORTH ANDOVER, MA, USA · Health Care · Latest available filing year: 2018 · Primary form: IRS Form 990
- International Medical Information Technologies Inc
EIN 010832456 · Headquarters: Newton, MA, US · Health Care · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- International Medical Interpreters Association Inc
EIN 161771606 · Headquarters: Woburn, MA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Medical Research Collaborative
EIN 474515165 · Headquarters: West Newton, MA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- International Medical Volunteers Association Inc
EIN 043323680 · Headquarters: Woodville, MA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- International Mental Help Inc
EIN 333146391 · Headquarters: Boston, MA, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Mentoring Foundation For The Advancement of Higher Education Inc
EIN 474157981 · Headquarters: Needham, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Meteorite Collectors Association Incorporated
EIN 202074456 · Headquarters: Haydenville, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- International Mini Cup Racing Irrv Tr
EIN 836651153 · Headquarters: groton, MA, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- International Molded Fiber Association
EIN 391887858 · Headquarters: SPRINGFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- International Monument to Honor Abused Women Foundation
EIN 300570759 · Headquarters: Salem, MA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Musculoskeletal Society (IMS) Inc
EIN 272716074 · Headquarters: Andover, MA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- International Museum of Military History
EIN 050503539 · Headquarters: Dighton, MA, US · Arts, Culture & Humanities · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- International Myeloma Society
EIN 264220253 · Headquarters: BOSTON, MA, USA · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Naval Research Organization Inc
EIN 331987323 · Headquarters: Holden, MA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Neuroendocrine Cancer Alliance
EIN 462961023 · Headquarters: Newton, MA, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2025 · Primary form: IRS Form 990
- International OCD Foundation Inc
EIN 222894564 · Headquarters: Boston, MA, USA · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Order of the Rainbow Girls
EIN 046121699 · Headquarters: Somerville, MA, US · Youth Development · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237130767 · Headquarters: Revere, MA, USA · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990
- International Order of the Rainbow Girls
EIN 237132846 · Headquarters: Revere, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237132848 · Headquarters: West Wareham, MA, US · Youth Development · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237133168 · Headquarters: Needham, MA, US · Youth Development · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237133401 · Headquarters: Cherry Valley, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237133650 · Headquarters: Swansea, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237133655 · Headquarters: Concord, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237134394 · Headquarters: Raynham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237134592 · Headquarters: Weymouth, MA, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237140179 · Headquarters: Haverhill, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237162043 · Headquarters: Natick, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237506429 · Headquarters: Petersham, MA, US · Youth Development · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237506432 · Headquarters: Revere, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237507239 · Headquarters: Longmeadow, MA, US · Youth Development · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237507243 · Headquarters: Southborough, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237507248 · Headquarters: Haverhill, MA, US · Youth Development · Latest available filing year: 2010 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237507250 · Headquarters: Holden, MA, US · Youth Development · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237507254 · Headquarters: Lexington, MA, US · Youth Development · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237507269 · Headquarters: Plymouth, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237507271 · Headquarters: Revere, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237507274 · Headquarters: East Brookfield, MA, US · Youth Development · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 237507284 · Headquarters: Easthampton, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls
EIN 273210409 · Headquarters: West Newton, MA, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls Supreme Assembly
EIN 237507236 · Headquarters: Weymouth, MA, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order of the Rainbow Girls Supreme Assembly
EIN 901033784 · Headquarters: Rutland, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Order Rainbow Girls Garnder 83
EIN 300692291 · Headquarters: Revere, MA, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Organization of Asian Crime Investigators & Specialists
EIN 562299466 · Headquarters: N SCITUATE, MA, US · Crime & Legal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Partnership Network Inc
EIN 541859736 · Headquarters: NEEDHAM, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ
- International Physicians for the Prevention of Nuclear War
EIN 042702110 · Headquarters: Malden, MA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Piano Seminars Inc
EIN 201005545 · Headquarters: Brookline, MA, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- International Reading Association
EIN 042978304 · Headquarters: North Attleboro, MA, US · Education · Latest available filing year: 2007 · Primary form: IRS Form 990-N
- International Reading Association
EIN 562643146 · Headquarters: Lawrence, MA, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N
- International Reading Association Inc
EIN 042717464 · Headquarters: Southborough, MA, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N
- International Reading Association Inc
EIN 043232389 · Headquarters: Boston, MA, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N
- International Reading Association Inc
EIN 046129665 · Headquarters: Lynnfield, MA, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- International Reading Association Inc
EIN 046129668 · Headquarters: Belchertown, MA, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- International Reading Association Inc
EIN 046129670 · Headquarters: Belmont, MA, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- International Reading Association Inc
EIN 046129672 · Headquarters: Pittsfield, MA, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N
- International Reading Association Inc
EIN 237020267 · Headquarters: Plymouth, MA, US · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-N
- International Reading Association Inc
EIN 320286201 · Headquarters: Worcester, MA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N
- International Reading Association Inc
EIN 455477489 · Headquarters: Chelmsford, MA, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- International Revival Presbyterian Church
EIN 611420870 · Headquarters: Marlborough, MA, USA · Religion Related · Latest available filing year: 2019 · Primary form: IRS Form 990
- International Rock Climbing School
EIN 043548491 · Headquarters: N ANDOVER, MA, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990
- International Saw and Knife Association
EIN 911113860 · Headquarters: Kingston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International School of America
EIN 316402773 · Headquarters: Medford, MA, US · International, Foreign Affairs & National Security · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- International School of Busan Inc
EIN 453089426 · Headquarters: NEWTON, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Science Foundation in Cambridge Inc
EIN 043476180 · Headquarters: SOMERVILLE, MA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990
- International Seniors Amateur Golf Society Inc
EIN 592803351 · Headquarters: MARSTONS MILLS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Shakyamuni Buddh
EIN 205204958 · Headquarters: LOWELL, MA, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990
- International Simone De Beauvoir Society Inc
EIN 823936691 · Headquarters: Boston, MA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Social Work Solutions Inc
EIN 812326811 · Headquarters: Hull, MA, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Society for Biophysical Economics
EIN 821282459 · Headquarters: Falmouth, MA, US · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- International Society for Disease Surveillance Inc
EIN 203805298 · Headquarters: BRIGHTON, MA, USA · Health Care · Latest available filing year: 2015 · Primary form: IRS Form 990
- International Society for Heart Research
EIN 237055675 · Headquarters: Boston, MA, USA · Medical Research · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ
- International Society for Infectious Diseases Inc
EIN 222473000 · Headquarters: BOSTON, MA, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Society for Minimally Invasive Cardiothoracic Surgery
EIN 411889746 · Headquarters: BEVERLY, MA, USA · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Society for New England Chapter
EIN 061323514 · Headquarters: WALTHAM, MA, USA · Science & Technology · Latest available filing year: 2012 · Primary form: IRS Form 990-EZ
- International Society for Omega-3 Research Inc
EIN 820997538 · Headquarters: Boston, MA, USA · Medical Research · Latest available filing year: 2025 · Primary form: IRS Form 990
- International Society for Solid State Ionics
EIN 812785724 · Headquarters: Cambridge, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- International Society for the Psychoanalytic Study of Organizations
EIN 481142858 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- International Society Inc
EIN 042730330 · Headquarters: NEWTON, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- International Society of Bone and Soft Tissue Pathology Inc
EIN 260037975 · Headquarters: Boston, MA, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- International Society of Data Scientists Inc
EIN 365002524 · Headquarters: Lexington, MA, US · Science & Technology · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- International Society of Glomerular Disease
EIN 922269671 · Headquarters: FLORENCE, MA, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Society of Nurses in Cancer Care Inc
EIN 611665965 · Headquarters: Newtonn, MA, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990
- International Society of Osteoarthritis Imaging (Isoai) Inc
EIN 832075324 · Headquarters: BOSTON, MA, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- International Society of Plastic and Aesthetic Nurses
EIN 510164353 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990