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. Marshfield Education Association Inc

    EIN 043309664 · Headquarters: Marshfield, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  2. Marshfield Lodge of Elks No 2494 Inc

    EIN 237313756 · Headquarters: MARSHFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Marshfield Rod and Gun Club Inc

    EIN 042348887 · Headquarters: MARSHFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. Marshfield Yacht Club Inc

    EIN 510153599 · Headquarters: MARSHFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Marstons Mills Historical Society Inc

    EIN 042961771 · Headquarters: Marstons Mills, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Marstons Mills Public Library

    EIN 042460444 · Headquarters: Marstons Mills, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Marstons Mills Village Association Inc

    EIN 222882524 · Headquarters: Marstons Mills, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Martha's Vineyard Camp Meeting Association

    EIN 042103815 · Headquarters: OAK BLUFFS, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  9. Martha's Vineyard Cancer Support Group

    EIN 043282215 · Headquarters: VINEYARD HAVEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  10. Martha's Vineyard Cerebral Palsy Camp Inc

    EIN 237188764 · Headquarters: VINEYARD HAVEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. Martha's Vineyard Chamber of Commerce Educational and Charitable

    EIN 042986537 · Headquarters: VINEYARD HAVEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  12. Martha's Vineyard Chamber of Commerce Inc

    EIN 042683358 · Headquarters: VINEYARD HAVEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Martha's Vineyard Mediation Program Inc

    EIN 222986634 · Headquarters: VINEYARD HAVEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Martha's Vineyard Playhouse Inc

    EIN 222518286 · Headquarters: VINEYARD HAVEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Martha's Vineyard Sexual Wellness Inc

    EIN 222794431 · Headquarters: Vineyard Haven, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Marthas Vineyard Beachgoers Access Group Inc

    EIN 883863329 · Headquarters: Edgartown, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Martina O'neil Tr

    EIN 046416879 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  18. Martins Pond Union Baptist Church

    EIN 042705375 · Headquarters: North Reading, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Mary a Crabtree Fund #0710800 Nutter Mcclennen & Fish Llp

    EIN 042607227 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  20. Mary A Warren Foundation

    EIN 931422593 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  21. Mary Alice Arakelian Foundation

    EIN 046155695 · Headquarters: Newburyport, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  22. Mary Ann Morse Healthcare Corp

    EIN 223064323 · Headquarters: FRAMINGHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Mary C O'brien Charitable Trust

    EIN 046404073 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  24. Mary E Armstrong Trust C/o Taylor Ganson & Perrin LLP

    EIN 046028143 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  25. Mary E Fleming & John J Fleming Scholarship Trust for Boston College HS

    EIN 223101265 · Headquarters: Cambridge, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  26. Mary E Fleming & John J Fleming Scholarship Trust for Holy Cross

    EIN 223115094 · Headquarters: Cambridge, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  27. Mary E Wood Foundation Thomas R Appleton Et Al Trustees

    EIN 046027441 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  28. Mary Elizabeth Pearce Foundation Tr

    EIN 046382377 · Headquarters: PLYMOUTH, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  29. Mary Friese Lowe Memorial Education Fund

    EIN 133040569 · Headquarters: ORLEANS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  30. Mary G Hitchcock Tuw Vincent Mccaughey Trustee

    EIN 510205082 · Headquarters: PAXTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  31. Mary Lee Burbank School Pta

    EIN 046111683 · Headquarters: BELMONT, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  32. Mary Nichols Trust Uw Charitable Trust

    EIN 046342221 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  33. Mary S Holzwasser Charitable Trust

    EIN 042679759 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  34. Mary-louise & Ruth Eddy Fdn

    EIN 222642870 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  35. Maryland Society of Health-system Pharmacists

    EIN 237270180 · Headquarters: WESTFORD, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  36. Marys Meadow at Providence Place Inc

    EIN 262043754 · Headquarters: Holyoke, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. Masawa Inc

    EIN 272559730 · Headquarters: Somerville, MA, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  38. Masayoshi Yanagi College Scholarship Fund

    EIN 043477189 · Headquarters: Tewksbury, MA, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  39. Masbo

    EIN 237333783 · Headquarters: Hopkinton, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. Mashantum Tennis Club Inc

    EIN 042350093 · Headquarters: DENNIS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. Mashpee Chamber of Commerce Inc

    EIN 222535556 · Headquarters: Mashpee, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  42. Mashpee Community Media Center Inc

    EIN 454985116 · Headquarters: MASHPEE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Mashpee Polar Bear Club Inc

    EIN 371747289 · Headquarters: MASHPEE, MA, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  44. Mason Wright Foundation Inc

    EIN 042105936 · Headquarters: SPRINGFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  45. Masonry Industry Equality Fund

    EIN 046831593 · Headquarters: CHARLESTOWN, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  46. Masons of Massachusetts Dalhousie Lodge

    EIN 237170804 · Headquarters: NEWTON HIGHLANDS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  47. Mass Assoc of Criminal Defense Lawyers

    EIN 223234036 · Headquarters: Worcester, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  48. Mass Association of Accountantsinc

    EIN 237135793 · Headquarters: PEABODY, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  49. Mass Bay Credit Union

    EIN 041104060 · Headquarters: SOUTH BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  50. Mass Bay Intergroup Inc

    EIN 042763938 · Headquarters: ARLINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  51. Mass Board of Real Estate Appraisers

    EIN 042706453 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  52. Mass Building Commissioners

    EIN 042716402 · Headquarters: ROWLEY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  53. Mass Business Educators Assn

    EIN 042667909 · Headquarters: Swampscott, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  54. Mass Coalition of Taft-hartley Trust Funds

    EIN 043214282 · Headquarters: TAUNTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  55. Mass Council of Adult Foster Care

    EIN 042889803 · Headquarters: SPRINGFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Mass Credit Union Share Insurance Corp

    EIN 042296410 · Headquarters: NEWTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  57. Mass Destruction Football and Cheer

    EIN 332611018 · Headquarters: BROCKTON, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Mass Divest Incorporated

    EIN 834638900 · Headquarters: Lowell, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  59. Mass Eta of Phi Kappa Theta Alumni Corp

    EIN 046063508 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  60. Mass Flower Growers Associationinc

    EIN 046605795 · Headquarters: BEDFORD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  61. Mass General Brigham Health Plan

    EIN 042932021 · Headquarters: SOMERVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. Mass L E a P Inc

    EIN 811668473 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  63. Mass Labor Action Network Inc

    EIN 834617227 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Mass Maple Producers Association Inc C/o Melissa Leab

    EIN 042377840 · Headquarters: HANCOCK, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Mass Restaurant Association Inc

    EIN 041591041 · Headquarters: WESTBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Mass School Library Association Inc

    EIN 223238052 · Headquarters: Wayland, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Mass Soc of Professors the University of Massachusetts Lowell

    EIN 042648751 · Headquarters: LOWELL, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Mass Society for Univ Education of Women

    EIN 046145949 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  69. Mass Society of Eye Physician & Surgeons Inc

    EIN 237208474 · Headquarters: Natick, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  70. Mass State Foxhound Assoication

    EIN 043519195 · Headquarters: CARVER, MA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  71. Mass Storm Softball Inc

    EIN 881994081 · Headquarters: New Bedford, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  72. Mass Teachers Assn 292 Edu Assn of Ply & Cvr

    EIN 237128526 · Headquarters: Plymouth, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. Mass Teachers Association

    EIN 042667903 · Headquarters: Mattapoisett, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. Mass Teachers Association

    EIN 237128536 · Headquarters: GLOUCESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Mass Technology Leadership Council

    EIN 042910567 · Headquarters: DEDHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Mass Theatrica

    EIN 202318158 · Headquarters: Shrewsbury, MA, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  77. Mass Uniting Inc

    EIN 451628839 · Headquarters: MARLBOROUGH, MA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  78. Mass Warriors Basketball Corporation

    EIN 882375123 · Headquarters: Chelsea, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  79. Mass Xplosion

    EIN 043484551 · Headquarters: New Bedford, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  80. Mass-ala

    EIN 043237159 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  81. Mass-india Partnership

    EIN 812780742 · Headquarters: BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Massa-schussers Ski Club Inc

    EIN 237381006 · Headquarters: Jamaica Plain, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Massachuseetts Association of Teacher Attorneys Inc

    EIN 222500393 · Headquarters: Quincy, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  84. Massachusett Automatic Merchandising Council Inc

    EIN 110029023 · Headquarters: Mansfield, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  85. Massachusetts 4-H Foundation Inc

    EIN 042303708 · Headquarters: FRAMINGHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Massachusetts Academy of Dermatology

    EIN 042551359 · Headquarters: BOXBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  87. Massachusetts Academy of General Dentistry

    EIN 237240701 · Headquarters: Quincy, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  88. Massachusetts Academy of Nutrition & Dietetics

    EIN 043253489 · Headquarters: Medway, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  89. Massachusetts Action to Prevent Gun Violence Inc

    EIN 333017706 · Headquarters: BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Massachusetts Adoption Resource Exchange Inc

    EIN 042227431 · Headquarters: Newton, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Massachusetts Agriculture in the Classroom Inc

    EIN 042868605 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  92. Massachusetts Airport Management Association Inc

    EIN 043283328 · Headquarters: Plymouth, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  93. Massachusetts Allergy & Asthma Society Inc

    EIN 042629468 · Headquarters: LEOMINSTER, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Massachusetts Alliance for Chiropractic Philosophy Inc

    EIN 043122947 · Headquarters: Burlington, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  95. Massachusetts Alliance for Economic Development Inc

    EIN 043172007 · Headquarters: WATERTOWN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. Massachusetts Ambulance Association Inc

    EIN 010894923 · Headquarters: BURLINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  97. Massachusetts and Northern New England Laborers District Council

    EIN 042424311 · Headquarters: Hopkinton, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  98. Massachusetts Archeological Society Inc

    EIN 046066001 · Headquarters: MIDDLEBORO, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  99. Massachusetts Assoc of Patient Acct Mgmt Inc

    EIN 510192427 · Headquarters: Granby, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  100. Massachusetts Association for Mental Health Inc

    EIN 042104711 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

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