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. Unite Here

    EIN 046065967 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Unite Here

    EIN 046071498 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Unite Here

    EIN 046113156 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Unite Here

    EIN 046119528 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Unite Here

    EIN 046189244 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Unite Here

    EIN 046189245 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Unite Here

    EIN 046190039 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Unite Here

    EIN 046190041 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Unite Here

    EIN 056013237 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Unite Here

    EIN 056015740 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Unite Here

    EIN 056016892 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Unite Here

    EIN 056034558 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Unite Here

    EIN 056035529 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Unite Here

    EIN 056047306 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Unite Here

    EIN 060756457 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Unite Here

    EIN 061068497 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Unite Here

    EIN 061068500 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Unite Here

    EIN 061246676 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Unite Here

    EIN 066043433 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Unite Here

    EIN 066069063 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. Unite Here

    EIN 066069068 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Unite Here

    EIN 066069069 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Unite Here

    EIN 066159665 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Unite Here

    EIN 066159668 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Unite Here

    EIN 066159670 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Unite Here

    EIN 166090191 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Unite Here

    EIN 200865944 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Unite Here

    EIN 200938548 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Unite Here

    EIN 222591457 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Unite Here

    EIN 237222877 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Unite Here

    EIN 352455960 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Unite Here

    EIN 911938803 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Unite Here Local 26

    EIN 042560456 · Headquarters: MEDFORD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. United Association Journeyman & Apprentices Plumbing & Pipefitting

    EIN 046227735 · Headquarters: W BOYLESTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. United Association of Journeymen

    EIN 041338432 · Headquarters: WEST BOYLSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. United Association of Journeymen & Apprentices of the Plumbing & Pipe

    EIN 042705589 · Headquarters: Holyoke, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. United Beagle Gundog Federation Inc

    EIN 352015398 · Headquarters: RAYNHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  38. United Brotherhood of Carpenters & Joiners of America

    EIN 041922564 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. United Brotherhood of Carpenters & Joiners of America

    EIN 043161090 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. United Brotherhood of Carpenters & Joiners of America Local 56

    EIN 041922536 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. United Brotherhood Union of Carpenter & Joiners of America

    EIN 041922519 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. United Church of Shirley

    EIN 237283026 · Headquarters: Shirley, MA, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  43. United Commercial Travelers of America

    EIN 042503442 · Headquarters: fitchburg, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  44. United Commercial Travelers of America

    EIN 237622292 · Headquarters: Longmeadow, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. United Educators of Pittsfield Inc

    EIN 471704067 · Headquarters: PITTSFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  46. United Electrical Radio & Machine Workers of America

    EIN 066189881 · Headquarters: Erving, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. United Electrical Radio & Machine Workers of America Ue Local 274

    EIN 042002129 · Headquarters: Greenfield, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  48. United Electrical Radio & Machine Workers Ue Local 256 - Mit-gsu

    EIN 933768251 · Headquarters: Cambridge, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. United Electrical Radio and Machine Workers of America

    EIN 454817542 · Headquarters: Gloucaster, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. United Electrical Radio and Machine Workers of America Ue Local 228

    EIN 821133126 · Headquarters: Amesbury, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  51. United Food & Commercial Workers International Union Local 8D

    EIN 041280626 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  52. United Food and Commercial Workers Local #1459

    EIN 042220774 · Headquarters: SPRINGFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  53. United Food and Commercial Workers Local 414C

    EIN 042089547 · Headquarters: BELCHERTOWN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  54. United Food and Commercial Workers Union Afl-cio Local 791

    EIN 237281421 · Headquarters: SOUTH EASTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  55. United for Economic Freedom Inc

    EIN 842297245 · Headquarters: Beverly, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  56. United Grand Imperial Coun Knights of Red Cross of Constantine

    EIN 237617452 · Headquarters: SHIRLEY, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. United Grand Imperial Coun Knights of Red Cross of Constantine

    EIN 237617453 · Headquarters: Chester, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. United Health Association Inc

    EIN 237187428 · Headquarters: Sagamore, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. United India Association of New England Inc

    EIN 223021277 · Headquarters: West Roxbury, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. United Nations Community Development Corporation -Uncdc

    EIN 923754876 · Headquarters: Lynn, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. United Ostomy Associations of America Inc

    EIN 046078259 · Headquarters: South Hadley, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  62. United Parish in Brookline

    EIN 042458504 · Headquarters: Brookline, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-T

  63. United Parish of Winchendon

    EIN 237067918 · Headquarters: Winchendon, MA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  64. United Professional Alliance of Charlton

    EIN 473032823 · Headquarters: Charlton, MA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  65. United Soccer League Players Association

    EIN 873484013 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. United Soccer of Auburn Inc

    EIN 042938770 · Headquarters: AUBURN, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  67. United States Amateur Boxing Foundation

    EIN 840976800 · Headquarters: DOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. United States Amateur Boxing Inc

    EIN 541372494 · Headquarters: Southwick, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. United States Amateur Boxing Inc Metropolitan Association

    EIN 133094674 · Headquarters: DOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  70. United States Amateur Boxing Inc New England Association

    EIN 042780843 · Headquarters: BURLINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  71. United States Bunting Cricket Club & Athletic Assoc Inc

    EIN 042385632 · Headquarters: LOWELL, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  72. United States Coast Guard

    EIN 465217604 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  73. United States Collegiate Ski And Snowboa USCSA

    EIN 510180685 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. United States Junior Chamber of Commerce

    EIN 222572701 · Headquarters: Foxboro, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. United States Pony Clubs Inc

    EIN 042971493 · Headquarters: Carlisle, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. United States Power Squadrons

    EIN 041630503 · Headquarters: Newton, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. United States Power Squadrons

    EIN 046054796 · Headquarters: Lakeville, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  78. United States Power Squadrons

    EIN 046067271 · Headquarters: Groton, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. United States Power Squadrons

    EIN 046088390 · Headquarters: Sturbridge, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. United States Power Squadrons

    EIN 046116171 · Headquarters: Harwich Port, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. United States Power Squadrons

    EIN 046130502 · Headquarters: Lynn, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  82. United States Power Squadrons

    EIN 046175358 · Headquarters: South Yarmouth, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. United States Power Squadrons

    EIN 046179593 · Headquarters: Newton, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  84. United States Power Squadrons

    EIN 046188999 · Headquarters: Rochester, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  85. United States Power Squadrons

    EIN 046189000 · Headquarters: Sagamore Beach, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. United States Power Squadrons

    EIN 237047430 · Headquarters: Hingham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. United States Power Squadrons

    EIN 237369009 · Headquarters: Pittsfield, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. United States Veterans Vietnam Era Post 2 South Shore

    EIN 042940462 · Headquarters: ROCKLAND, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. United Steelworkers

    EIN 026012615 · Headquarters: Wakefield, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  90. United Steelworkers

    EIN 042514509 · Headquarters: MARLBORO, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. United Steelworkers

    EIN 042650002 · Headquarters: GARDNER, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. United Steelworkers

    EIN 042709330 · Headquarters: AGAWAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. United Steelworkers

    EIN 043308797 · Headquarters: SHIRLEY, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. United Steelworkers

    EIN 043449465 · Headquarters: Marlborough, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. United Steelworkers

    EIN 043481209 · Headquarters: Westport, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. United Steelworkers

    EIN 046112088 · Headquarters: ATTLEBORO, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. United Steelworkers

    EIN 046114491 · Headquarters: Dedham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. United Steelworkers

    EIN 046136770 · Headquarters: West Groton, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. United Steelworkers

    EIN 046190065 · Headquarters: TEMPLETON, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  100. United Steelworkers

    EIN 237154182 · Headquarters: MILFORD, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

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