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

  1. Alyssa G Foundation Inc

    EIN 831316785 · Headquarters: South Dartmouth, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Alzheimer's Support Network of Sc Massachusetts

    EIN 042880502 · Headquarters: SOUTHBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  3. Am Vets Post 1980

    EIN 222521941 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  4. Amalgamated Cleaning Dyeing & Related Industries Trust

    EIN 042017582 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Amalgamated Transit Union - Local 690

    EIN 041025676 · Headquarters: FITCHBURG, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  6. Amalgamated Transit Union 1363 Local

    EIN 050341821 · Headquarters: SWANSEA, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  7. Amalgamated Transit Union 1548

    EIN 237277676 · Headquarters: PLYMOUTH, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  8. Amalgamated Transit Union 1578 C/o Leeann Maille

    EIN 042610995 · Headquarters: LOWELL, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  9. Amalgamated Transit Union 589

    EIN 041103405 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  10. Amalgamated Transit Union Local 1512

    EIN 521339762 · Headquarters: SPRINGFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  11. Amalgamated Transit Union Local 174

    EIN 042381854 · Headquarters: FALL RIVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  12. Amalgamated Transit Union Local 448

    EIN 041025670 · Headquarters: SPRINGFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  13. Amalgamated Transit Union Locl 1037

    EIN 042373376 · Headquarters: North Dartmouth, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  14. Amalgamated Transit Union-division 1547

    EIN 237167350 · Headquarters: BROCKTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  15. Amaral Advantage Foundation Inc

    EIN 882152951 · Headquarters: FALL RIVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  16. Amateur Athletic Union of the United States

    EIN 364709208 · Headquarters: Millbury, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. Amateur Athletic Union of the United States Inc

    EIN 475396800 · Headquarters: LONGMEADOW, MA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  18. Amateur Athletic Union of the United States Inc

    EIN 811618498 · Headquarters: east bridgewater, MA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  19. Amateur Athletic Union of the United States Inc

    EIN 873154385 · Headquarters: Buzzards Bay, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  20. Amateur Athletic Unions of the Us Inc

    EIN 463628491 · Headquarters: Fairhaven, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  21. AMCS Corporation

    EIN 824225108 · Headquarters: Brookline, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Amelia Davis Fund for Incapacitated Alumni

    EIN 046133792 · Headquarters: FRAMINGHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  23. Amer Soc of Plumb Eng-Boston Chapter

    EIN 043367647 · Headquarters: East Walpole, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  24. Amercian Legion

    EIN 043574098 · Headquarters: SOUTH DENNIS, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Amercian Legion

    EIN 043619417 · Headquarters: SWAMPSCOTT, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Amercian Legion Auxiliary

    EIN 043255282 · Headquarters: Wilmington, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  27. America's Credit Union Museum Foundation C/o Cooperative Credit Union Association

    EIN 020472576 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  28. American Academy of Matrimonial Lawyers

    EIN 510235421 · Headquarters: Stoneham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. American Academy of Medical Education

    EIN 462857430 · Headquarters: WESTBOROUGH, MA, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  30. American Academy of the History of Dentistry

    EIN 237441884 · Headquarters: WABAN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  31. American Air Mail Society

    EIN 256066186 · Headquarters: West Chatham, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  32. American Alliance for Financial Literacy Inc

    EIN 844565929 · Headquarters: Wrentham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. American Amputee Hockey Association Inc

    EIN 043530307 · Headquarters: HANOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  34. American Amvets of World War Ii Amvets 0208

    EIN 046183748 · Headquarters: HUDSON, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  35. American Arabic Benevolent Association Inc

    EIN 237410495 · Headquarters: WEST ROXBURY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. American Art Therapy Association Inc

    EIN 043438507 · Headquarters: Groveland, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  37. American Assoc of Jewish Holcaust Survivors of Greater Boston Inc

    EIN 042602020 · Headquarters: brookline, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. American Association for Hand Surgery Inc

    EIN 030276175 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. American Association of Neuroscience Nurses

    EIN 201355764 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. AMERICAN ASSOCIATION OF ZOO KEEPERS Zoo New England Chapter

    EIN 043098415 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  41. American Begonia Society

    EIN 911933000 · Headquarters: Cambridge, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. American Boad of Abdominal Surgery

    EIN 042242379 · Headquarters: BURLINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  43. American Board of Dermatology Inc

    EIN 131549125 · Headquarters: NEWTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. American Brittany Club Inc

    EIN 362550600 · Headquarters: FRANKLIN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. American Chemical Society

    EIN 046058432 · Headquarters: Worcester, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. American Chemical Society

    EIN 208695151 · Headquarters: Lowell, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. American Chemical Society

    EIN 396065798 · Headquarters: Arlington, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  48. American Civic Association Inc

    EIN 043109868 · Headquarters: WINCHESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  49. American Classic Theater Inc

    EIN 453597258 · Headquarters: Worcester, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  50. American College of Chiropractic Orthopedists

    EIN 330202561 · Headquarters: Melrose, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. American College of Nurse-midwives

    EIN 800546257 · Headquarters: Springfield, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. American Corpus Vitrearum Inc

    EIN 133556544 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. American Council of Educators in Plastic Surgery

    EIN 930932714 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. American Council of Engineering Companies of Massachusetts

    EIN 042448284 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. American Council of Engineering Companies of Massachusetts Ed Corp

    EIN 205465020 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  56. American Credit Counseling Service Inc

    EIN 043155735 · Headquarters: Attleboro, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. American Dental Assistants Association

    EIN 237026205 · Headquarters: Worcester, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  58. American Druze Society

    EIN 237155194 · Headquarters: SOUTH WEYMOUTH, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  59. American Electrology Association American Electrology Association

    EIN 510142552 · Headquarters: CHELMSFORD, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  60. American Federation & State County Municapal Employees

    EIN 043012009 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  61. American Federation for Medical Research Foundation

    EIN 223061358 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  62. American Federation of Government

    EIN 596214606 · Headquarters: Byfield, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  63. American Federation of Government Employees

    EIN 020344806 · Headquarters: Erving, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. American Federation of Government Employees

    EIN 042638229 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. American Federation of Government Employees

    EIN 042693819 · Headquarters: Pittsfield, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. American Federation of Government Employees

    EIN 237072196 · Headquarters: Otis ANG Bas, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. American Federation of Government Employees

    EIN 273360001 · Headquarters: BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. American Federation of Government Employees

    EIN 900526001 · Headquarters: Shirley, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. American Federation of Government Employees

    EIN 901185130 · Headquarters: Buzzards Bay, MA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  70. American Federation of Govt Empl

    EIN 043441111 · Headquarters: Jamaica Plain, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  71. American Federation of Govt Employees Local 1164

    EIN 056014277 · Headquarters: East Longmeadow, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  72. American Federation of Govt Employees Local 2617

    EIN 273389964 · Headquarters: REVERE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  73. American Federation of Labor & Congress of Industrial Orgs

    EIN 042777813 · Headquarters: Holyoke, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  74. American Federation of Labor & Congress of Industrial Orgs

    EIN 042935290 · Headquarters: Dorchester, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  75. American Federation of Labor & Congress of Industrial Orgs

    EIN 046115226 · Headquarters: LOWELL, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. American Federation of Labor & Congress of Industrial Orgs

    EIN 046116073 · Headquarters: West Boylston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. American Federation of Labor & Congress of Industrial Orgs

    EIN 046116760 · Headquarters: Auburn, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  78. American Federation of Labor & Congress of Industrial Orgs

    EIN 046119713 · Headquarters: Braintree, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. American Federation of Labor & Congress of Industrial Orgs

    EIN 237009629 · Headquarters: Roslindale, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. American Federation of Labor & Congress of Industrial Orgs

    EIN 237274671 · Headquarters: Lynn, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  81. American Federation of Labor & Congress of Industrial Orgs

    EIN 911807619 · Headquarters: DEDHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. American Federation of Labor & Construction Trades Council

    EIN 521701467 · Headquarters: QUINCY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  83. American Federation of Labor & Greater

    EIN 510428056 · Headquarters: New Bedford, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  84. American Federation of Labor & Mass Building & Const Trades

    EIN 237009626 · Headquarters: MALDEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  85. American Federation of Musicians Building Fund

    EIN 046307813 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. American Federation of Musicians Local 9-535 Afm

    EIN 041106210 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. American Federation of Musicians of the Us & Canada

    EIN 042051402 · Headquarters: Lowell, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. American Federation of Musicians of the Us & Canada

    EIN 042052077 · Headquarters: LEOMINSTER, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. American Federation of Musicians of Us & Canada

    EIN 042046109 · Headquarters: Maynard, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. American Federation of Musicians of Us & Canada

    EIN 042050624 · Headquarters: Springfield, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. American Federation of State Count Municipal Employees Local 3650 Huc

    EIN 042909817 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  92. American Federation of State County & Municipal Employe

    EIN 046189917 · Headquarters: Marshfield, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  93. American Federation of State County & Municipal Employees

    EIN 010339164 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. American Federation of State County & Municipal Employees

    EIN 010362622 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. American Federation of State County & Municipal Employees

    EIN 010597142 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. American Federation of State County & Municipal Employees

    EIN 016018556 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. American Federation of State County & Municipal Employees

    EIN 016027644 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. American Federation of State County & Municipal Employees

    EIN 016027645 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. American Federation of State County & Municipal Employees

    EIN 016027649 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. American Federation of State County & Municipal Employees

    EIN 016046617 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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