Unknown & Unclassified nonprofits in Massachusetts
Unknown & Unclassified nonprofits in Massachusetts. Browse 12,299 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
- National Air Traffic Controllers Association
EIN 043037328 · Headquarters: BEDFORD, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Air Traffic Controllers Association
EIN 412235478 · Headquarters: Worcester, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Air Traffic Controllers Association
EIN 522181907 · Headquarters: Burlington, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Air Traffic Controllers Association
EIN 844424207 · Headquarters: North Andover, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Air Traffic Controllers Association
EIN 844523422 · Headquarters: Norwood, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Air Traffic Controllers Association
EIN 853639725 · Headquarters: Westfield, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Air Traffic Controllers Association
EIN 874100063 · Headquarters: New Bedford, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Alliance On Mental Illness-Cambridge
EIN 042767457 · Headquarters: Cambridge, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Assoc for Phys Ed in Higher Edu
EIN 237087214 · Headquarters: Cambridge, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990
- National Assoc of Exec Recruiters Inc Co Sjg Search
EIN 363336606 · Headquarters: EASTHAMPTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Assoc of Government Employees
EIN 042695638 · Headquarters: South Yarmouth, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Assoc of Government Employees
EIN 042860586 · Headquarters: West Roxbury, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Assoc of Letter Carriers
EIN 046188060 · Headquarters: TEWKSBURY, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Associaion of Letter Carriers
EIN 046071040 · Headquarters: peabody, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Association for Armenian Studies and Research Inc
EIN 042215574 · Headquarters: Belmont, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Association of Catering Executives Inc
EIN 611211321 · Headquarters: Quincy, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Clinical Nurse Specialists
EIN 330671730 · Headquarters: WAKEFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Association of Fsa County Office Employees
EIN 046167887 · Headquarters: HATFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 042209421 · Headquarters: QUINCY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Association of Government Employees
EIN 043158744 · Headquarters: Norwood, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 043206277 · Headquarters: WESTBOROUGH, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 237325496 · Headquarters: Natick, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 262567746 · Headquarters: Wilbraham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 450595415 · Headquarters: Lexington, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 571162087 · Headquarters: BUZZARDS BAY, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 651206813 · Headquarters: Hampden, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Government Employees
EIN 800494597 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Association of Government Employees Ibpo Local 579 Inc
EIN 412274805 · Headquarters: SOUTH DENNIS, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- National Association of Government Employees Local 806
EIN 372073536 · Headquarters: Quincy, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Government Employees Local R1-33
EIN 300301995 · Headquarters: Chelmsford, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Guardsmen - Boston Chapter
EIN 222450148 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Association of Letter Carriers
EIN 046065381 · Headquarters: PITTSFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Association of Letter Carriers
EIN 046065699 · Headquarters: Fall River, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Association of Letter Carriers
EIN 046112352 · Headquarters: WORCESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Association of Letter Carriers
EIN 046112422 · Headquarters: Dedham, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Association of Letter Carriers
EIN 046113147 · Headquarters: Norwood, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Letter Carriers
EIN 046113383 · Headquarters: Lawrence, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- National Association of Letter Carriers
EIN 046187092 · Headquarters: FRAMINGHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Association of Letter Carriers
EIN 237114859 · Headquarters: Taunton, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Letter Carriers Branch 34 Afl-cio
EIN 042189090 · Headquarters: WOBURN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Association of Letter Carriers of the Us of America
EIN 046075131 · Headquarters: MIDDLEBORO, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Association of Miniature Enthusiasts
EIN 311360913 · Headquarters: Marstons Mills, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Retired & Veteran Railway Employees
EIN 363631731 · Headquarters: Billerica, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Tax Professionals
EIN 043282358 · Headquarters: WESTWOOD, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Association of Trade Exchanges
EIN 431436356 · Headquarters: Malden, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Association of Watch & Clock Collectors Inc
EIN 042577639 · Headquarters: Malden, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Association of Women in Construction
EIN 042627224 · Headquarters: Hopkinton, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Association of Women in Construction
EIN 046144091 · Headquarters: Brookline, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- National Association Ofjewish Legislators
EIN 222188059 · Headquarters: Northampton, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Auxiliary of the Sons of Union Veterans of Civil War
EIN 020792681 · Headquarters: Methuen, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Auxiliary of the Sons of Union Veterans of Civil War
EIN 453066371 · Headquarters: Belchertown, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Auxiliary of the Sons of Union Veterans of Civil War
EIN 473703254 · Headquarters: Belchertown, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- National Auxiliary of the Sons of Union Veterans of Civil War
EIN 814983366 · Headquarters: Belchertown, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N
- National Black Nurses Association Inc
EIN 043286698 · Headquarters: SPRINGFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Brain Tumor Society Inc
EIN 043068130 · Headquarters: NEWTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Camping Travelers Mass 1 Chapter 9
EIN 222543825 · Headquarters: Rehoboth, MA, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N
- National Center for Civic Empowerme Nt Inc
EIN 395045072 · Headquarters: BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Center for Teaching Thinking Inc
EIN 223184806 · Headquarters: SANDWICH, MA, USA · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990
- National Corvette Restorers Society
EIN 010506527 · Headquarters: Weston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Council Freeher Network
EIN 882136332 · Headquarters: ROXBURY, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- National Council of Jewish Women
EIN 046151904 · Headquarters: North Dartmouth, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Council of Negro Women Inc
EIN 043464902 · Headquarters: Woburn, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Deaf Basketball Organization Inc
EIN 800315675 · Headquarters: Holyoke, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Elevator Industry Educational Program
EIN 236421955 · Headquarters: Attleboro Falls, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Energy & Fuels Institute Inc Formerly New England Fuel Institute Inc
EIN 042078321 · Headquarters: WILMINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Exchange Club
EIN 046192732 · Headquarters: Clinton, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 310923193 · Headquarters: Newburyport, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Exchange Club
EIN 582670175 · Headquarters: Haverhill, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Exchange Club 1581 Haverhill Ma
EIN 046192864 · Headquarters: HAVERHILL, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- National Exchange Club 1586 Needham Ma
EIN 046192867 · Headquarters: NEEDHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990
- National Exchange Club 1591 Spencer Ma
EIN 046192873 · Headquarters: SPENCER, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Federation of Municipal Analysts
EIN 043182063 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Federation of the Blind of Massachusetts Inc
EIN 046116104 · Headquarters: Lynn, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Fire Information Council Inc a Michigan Non Profit
EIN 382992655 · Headquarters: Stow, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Football Foundation and College Hall of Fame Inc
EIN 042656127 · Headquarters: Bridgewater, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Football Foundation and College Hall of Fame Inc
EIN 043150517 · Headquarters: Shrewsbury, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N
- National Football Foundation of Western Mass Chapter
EIN 510238521 · Headquarters: LONGMEADOW, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-PF
- National Guard Association of Mass
EIN 046067831 · Headquarters: HANSCOM AFB, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Ice Hockey Officials Association Inc
EIN 020350627 · Headquarters: MEDFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- National Immigration Litigation Alliance Inc
EIN 844675622 · Headquarters: BROOKLINE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Kitchen & Bath Assoc
EIN 043060540 · Headquarters: Plymouth, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Network for Early Language
EIN 521858420 · Headquarters: SOUTH GRAFTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- National Onsite Wastewater Recycling Association
EIN 593099430 · Headquarters: Westford, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Order of Trench Rats
EIN 042716562 · Headquarters: taunton, MA, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- National Order of Trench Rats
EIN 900798128 · Headquarters: taunton, MA, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N
- National Organization for Rare Disorders (NORD)
EIN 133223946 · Headquarters: Norwell, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990
- National Organization for Women Inc Mass Now
EIN 510242862 · Headquarters: JAMAICA PLAIN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ
- National Organization of Black Law Enforcement Executives-noble
EIN 832894524 · Headquarters: Randolph, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Organization of Mothers of Twins Clubs Inc
EIN 042790934 · Headquarters: FRAMINGHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Organization of Mothers of Twins Clubs Inc
EIN 043049513 · Headquarters: TEWKSBURY, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Organization of Mothers of Twins Clubs Inc
EIN 521290484 · Headquarters: LOWELL, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N
- National Parents Union Action Fund New York
EIN 931698990 · Headquarters: WOBURN, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N
- National Prison Hospice Association
EIN 841179957 · Headquarters: Hatfield, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N
- National Puzzlers' League C/o Katherine Hamill
EIN 222186878 · Headquarters: Arlington, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ
- National Rural Letter Carriers Association
EIN 421536116 · Headquarters: Northampton, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Rural Letter Carriers Association
EIN 421536118 · Headquarters: Brockton, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Rural Letter Carriers Association
EIN 421536121 · Headquarters: Ashby, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National School Development Council Inc
EIN 237273907 · Headquarters: Marlborough, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N
- National Scoliosis Foundation Inc
EIN 042622698 · Headquarters: Stoughton, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990
- National Society Colonial Dames Xvii Century
EIN 042888062 · Headquarters: Norwell, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N