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. Malden Public Library

    EIN 046003232 · Headquarters: MALDEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Malden Square and Compass Club

    EIN 043090887 · Headquarters: Malden, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Mallikarjunan Family Foundation Incorporated

    EIN 842172199 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  4. Managers of Boston Port and Seamen's Aid Society

    EIN 042104688 · Headquarters: SALEM, MA, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-PF

  5. Manchester Affordable Housing Corporatio

    EIN 043569418 · Headquarters: MANCHESTER BY THE SEA, MA, USA · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-EZ

  6. Manchester Bath & Tennis Club Inc

    EIN 042126677 · Headquarters: MANCHESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Manchester Essex Education Fund Inc

    EIN 237432493 · Headquarters: GLOUCESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  8. Manchester Garden Club

    EIN 043333766 · Headquarters: MANCHESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  9. Manchester Mothers Club

    EIN 043167377 · Headquarters: Manchester, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Manchester Sailing Association Inc

    EIN 042481638 · Headquarters: MANCHESTER BY THE SEA, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  11. Manchester Summerstage Incorporated

    EIN 043192571 · Headquarters: Manchester, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  12. Manchester Womans Club

    EIN 046056769 · Headquarters: Manchester, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Manchester Yacht Club

    EIN 041576400 · Headquarters: MANCHESTER BY THE SEA, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Mansfield Association of Secretaries and Clerks

    EIN 364650976 · Headquarters: MANSFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  15. Mansfield Firefighters IAFF Local 1820

    EIN 237062864 · Headquarters: Mansfield, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  16. Mansfield Housing Corporation

    EIN 273417181 · Headquarters: MANSFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Mantzouranis Scholarship Trust Orestes Brown

    EIN 326561720 · Headquarters: GLOUCESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  18. Maple Hill Cemetery Association

    EIN 046193995 · Headquarters: Peabody, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Maple Street Ski Club Inc

    EIN 020365252 · Headquarters: N FALMOUTH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  20. Marblehead Awareness Group

    EIN 042944554 · Headquarters: MARBLEHEAD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  21. Marblehead Business Referral Network

    EIN 462569467 · Headquarters: Marblehead, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  22. Marblehead Chamber of Commerce Inc

    EIN 042210613 · Headquarters: MARBLEHEAD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Marblehead Counseling Center

    EIN 237051965 · Headquarters: MARBLEHEAD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Marblehead Female Humane Society Inc

    EIN 042104694 · Headquarters: MARBLEHEAD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  25. Marblehead International One Design Fleet Inc

    EIN 352478354 · Headquarters: Marblehead, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Marblehead Neck Association

    EIN 880728854 · Headquarters: Marblehead, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Marblehead Police Union

    EIN 223131666 · Headquarters: MARBLEHEAD, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Marblehead Rotary Club

    EIN 046108039 · Headquarters: MARBLEHEAD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  29. Marblehead Track Association Inc

    EIN 471837627 · Headquarters: Marblehead, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Marblehead Yacht Club Inc

    EIN 042222212 · Headquarters: MARBLEHEAD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Marblehead Youth Basketball Association

    EIN 841659128 · Headquarters: Marblehead, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Marblehead Youth Football Cheerleading

    EIN 813294706 · Headquarters: Marblehead, MA, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  33. Marc E Leland Foundation

    EIN 954078342 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  34. March Forward Massachusetts Action

    EIN 820664861 · Headquarters: Watertown, MA, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  35. Marchegiano Club Inc

    EIN 042386077 · Headquarters: Milford, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  36. Marconi Club of Stoneham Ma Inc

    EIN 042488455 · Headquarters: STONEHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  37. Marcus Lewis Tennis Extension Program Inc

    EIN 472553122 · Headquarters: Lancaster, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Margaret Burr Tr Uw 0709238 Nutter Mcclennen & Fish Llp

    EIN 046092944 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  39. Margaret Dumas Tr Uw

    EIN 046457284 · Headquarters: HANOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  40. Margaret L Robinson Trust Charitable Trust

    EIN 046012367 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  41. Maria L H Peirce Tr Uw Fbo St Lukes

    EIN 046261817 · Headquarters: HANOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  42. Maria Marino Scholarship Fund C/o Avon Town Treasurer

    EIN 510181012 · Headquarters: Avon, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  43. Maria Phillips Trust Uw

    EIN 046018955 · Headquarters: HANOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  44. Mariadb Foundation

    EIN 383890082 · Headquarters: WAKEFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. Marietta W Dyer Trust Uw

    EIN 042127029 · Headquarters: HANOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  46. Marillac Residence Inc

    EIN 043436894 · Headquarters: WELLESLEY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Marilyn & Mike Grossman Foundation C/o Grossman Family Office

    EIN 046115409 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  48. Marilyn Snow House Foundation Inc

    EIN 133201285 · Headquarters: CUTTYHUNK, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  49. Marine Biological Laboratory Post-retirement Medical Care Fund

    EIN 043285249 · Headquarters: Woods Hole, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Marine Corps League

    EIN 020685700 · Headquarters: oxford, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  51. Marine Corps League

    EIN 042604636 · Headquarters: Peabody, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Marine Corps League

    EIN 046066633 · Headquarters: Ware, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  53. Marine Corps League

    EIN 046188657 · Headquarters: Norwood, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Marine Corps League

    EIN 046188669 · Headquarters: westfield, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Marine Corps League

    EIN 046188671 · Headquarters: DRACUT, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  56. Marine Corps League

    EIN 201131882 · Headquarters: Athol, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Marine Corps League

    EIN 237060804 · Headquarters: North Falmouth, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  58. Marine Corps League

    EIN 261969705 · Headquarters: Peabody, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  59. Marine Corps League

    EIN 263387383 · Headquarters: WESTFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Marine Corps League

    EIN 392061663 · Headquarters: SOMERSET, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Marine Corps League

    EIN 770713443 · Headquarters: Fitchburg, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  62. Marine Corps League

    EIN 800170180 · Headquarters: Worcester, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Marine Corps League

    EIN 820878709 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Marine Corps League

    EIN 830397636 · Headquarters: Pittsfield, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Marine Corps League 128 Capt William D Glynn Detchmnt

    EIN 912051856 · Headquarters: Haverhill, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Marine Corps League Pvt Charles J Shutt Detachment

    EIN 237161661 · Headquarters: Watertown, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  67. Marine Corps League South Central Mass

    EIN 010642622 · Headquarters: FISKDALE, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Marine Corps League William R Caddy Detachment

    EIN 046188658 · Headquarters: NORTH QUINCY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Marine Lodge Af & Am

    EIN 041582326 · Headquarters: FALMOUTH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  70. Marine Reef Habitats Inc

    EIN 933066445 · Headquarters: Holyoke, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Marine Renewable Energy Collaborati

    EIN 463825104 · Headquarters: Marion, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  72. Marine Society at Salem

    EIN 042266264 · Headquarters: SALEM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. Mariner Youth Soccer Club Inc

    EIN 222481543 · Headquarters: MATTAPOISETT, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  74. Marino Charitable Foundation Lauren D Marino Trustee

    EIN 046749547 · Headquarters: DOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  75. Marion Emt Association Marion Police and Fire Station

    EIN 042670288 · Headquarters: Marion, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  76. Marion L Decrow Foundation

    EIN 046278656 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  77. Marion Library Association

    EIN 042151737 · Headquarters: MARION, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Marion Police Brotherhood

    EIN 043184957 · Headquarters: MARION, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  79. Marion Social Club Inc

    EIN 042718184 · Headquarters: Marion, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Marjorie Savoie Ministries

    EIN 462352447 · Headquarters: Agawam, MA, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  81. Mark & Judith Bloomberg Family Foundation Inc

    EIN 471172680 · Headquarters: SUDBURY, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  82. Mark Charbonnier Scholarship Fund Inc

    EIN 471127421 · Headquarters: BRAINTREE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  83. Mark Miminos Charitable Trust & Foundation

    EIN 042944490 · Headquarters: BURLINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  84. Marlboro Chapt No 657 Women of the Moose

    EIN 237150029 · Headquarters: MARLBORO, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Marlboro Lodge No 1129 Loyal Order of Moose Incorporated

    EIN 041559170 · Headquarters: MARLBORO, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  86. Marlborough Cable Trust

    EIN 042741882 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. Marlborough Community Preservation Act Committee

    EIN 270963141 · Headquarters: Marlborough, MA, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  88. Marlborough Educators Association Inc

    EIN 237174581 · Headquarters: Marlborough, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. Marlborough Fish and Game Association Inc

    EIN 042068546 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Marlborough Historical Society

    EIN 046169254 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  91. Marlborough Police Patrol Officers Association

    EIN 046387750 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  92. Marlborough Regional Chamber of Commerce Inc

    EIN 042349840 · Headquarters: Marlborough, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Marlene a Mills Foundation

    EIN 472836292 · Headquarters: Walpole, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  94. Marr Charitable Foundation

    EIN 222699881 · Headquarters: SOUTH BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  95. Marsh Post 442 Ladies Auxillary

    EIN 271621225 · Headquarters: BELMONT, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  96. Marshall M & Barbara J Sloane Pvt Found C/o Linda Sloane Kay

    EIN 046675875 · Headquarters: CHESTNUT HILL, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  97. Marshall Street Historical Society Inc

    EIN 042281110 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  98. Marshfield Chamber of Commerce

    EIN 042534342 · Headquarters: Marshfield, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  99. Marshfield Council on Aging Boosters Inc

    EIN 311814836 · Headquarters: MARSHFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  100. Marshfield Country Club

    EIN 041585740 · Headquarters: MARSHFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

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