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. Standards Engineering Society

    EIN 066010634 · Headquarters: WAKEFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Standish Memorial Scholarship Fund

    EIN 046136148 · Headquarters: dighton, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Standish Sportsmen Association Inc

    EIN 510204452 · Headquarters: EAST BRIDGEWATER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. Stanley Street Treatment and Resources Inc

    EIN 042604426 · Headquarters: FALL RIVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Stanley W Watson Foundation C/o Carol Chittenden

    EIN 223100750 · Headquarters: FALMOUTH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  6. Star of the Sea Mens Club Inc

    EIN 042815757 · Headquarters: East Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Stars Stripes & Spoons 4-H Club

    EIN 814248605 · Headquarters: North Reading, MA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  8. State Archery Association of Massachusetts Inc

    EIN 270340029 · Headquarters: FRAMINGHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  9. State Legislative Leaders Foundation Inc

    EIN 237148478 · Headquarters: MARSTONS MILLS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. State Police Association of Massachusetts

    EIN 042462459 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  11. State Police Commissioned Officers' Association of Mass Inc

    EIN 042710087 · Headquarters: Framingham, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. State Police Striders

    EIN 874394046 · Headquarters: Lynnfield, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Statewide Towing Association Inc

    EIN 237121457 · Headquarters: AMESBURY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  14. Status Project Inc

    EIN 993865004 · Headquarters: BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. Steel Erection & Ornamental Iron Industry Advancement Fund

    EIN 222514310 · Headquarters: BRAINTREE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Stefanik School Pto

    EIN 301431286 · Headquarters: Chicopee, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Stem Horizons Inc

    EIN 932998206 · Headquarters: Sharon, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  18. Stephen D and Susan W Paine Foundation

    EIN 046013050 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  19. Stephen J Meoli Memorial Foundation

    EIN 042679904 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  20. Steppingstone Realty Holdings Inc

    EIN 043410322 · Headquarters: FALL RIVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. Sterling Ems Inc

    EIN 237378148 · Headquarters: STERLING, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Sterling Historical Society Inc

    EIN 046140811 · Headquarters: Sterling, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Sterling Youth Soccer Association

    EIN 042737030 · Headquarters: Sterling, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Stern Family Foundation C/o Feldberg Family Office

    EIN 223073966 · Headquarters: AUBURN, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  25. Steven & Renee Finn Foundations

    EIN 046745285 · Headquarters: NATICK, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  26. Stevens-bennett Foundation Inc

    EIN 042104803 · Headquarters: HAVERHILL, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  27. Stevenson Family Charitable Trust

    EIN 046629590 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  28. Still Mountain Tai Chi Center Inc

    EIN 571209251 · Headquarters: Somerville, MA, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  29. Stillpoint Martha's Vineyard Inc

    EIN 871043229 · Headquarters: CHILMARK, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Stockbridge Chamber of Commerce In

    EIN 042634662 · Headquarters: STOCKBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  31. Stockbridge Golf Club

    EIN 041873345 · Headquarters: STOCKBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Stockbridge Sportsmens Club Inc

    EIN 042984117 · Headquarters: STOCKBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  33. Stoddard Charitable Trust

    EIN 046023791 · Headquarters: WORCESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  34. Stodge Meadow Association Inc

    EIN 042777707 · Headquarters: ASHBURNHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  35. Stohlman Foundation Inc

    EIN 042868603 · Headquarters: NEEDHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  36. Stone Family Charitable Foundation C/o James Stone

    EIN 046121448 · Headquarters: BRIGHTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  37. Stone Horse Yacht Club Inc

    EIN 042280071 · Headquarters: BREWSTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  38. Stone Institute and Newton Home for Aged People

    EIN 042105896 · Headquarters: NEWTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  39. Stoneham Chamber of Commerce Inc

    EIN 042936730 · Headquarters: STONEHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  40. Stoneham Historical Society Inc

    EIN 046111744 · Headquarters: STONEHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. Stoneham Little League Inc

    EIN 237019817 · Headquarters: STONEHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  42. Stoneham Police Association

    EIN 042813405 · Headquarters: Stoneham, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Stonehouse Inc C/o D Packer

    EIN 223115000 · Headquarters: VINEYARD HAVEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  44. Stony Brook Fish and Game Assn Inc Johnson

    EIN 237094297 · Headquarters: WESTFORD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. StonyBrook I Housing Services Inc

    EIN 814449057 · Headquarters: Lowell, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  46. Stop China Now Inc

    EIN 331310492 · Headquarters: GREENFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Stop Handgun Violence Foundation

    EIN 043281075 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Stories with Purpose Inc

    EIN 852009320 · Headquarters: Waltham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Storm Youth Football and Cheerleading Inc

    EIN 452859999 · Headquarters: Quincy, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Story Space

    EIN 273682795 · Headquarters: Woburn, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Stoughton Association for Exceptional Citizens

    EIN 237305173 · Headquarters: Stoughton, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Stoughton Extended Day Program Inc

    EIN 043061411 · Headquarters: STOUGHTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990

  53. Stoughton Police Superior Officers Union Local 461

    EIN 562410032 · Headquarters: STOUGHTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Stoughton Youth Athletic Club Inc

    EIN 043104004 · Headquarters: STOUGHTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  55. Stow Community Chest Incorporated

    EIN 042794423 · Headquarters: STOW, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  56. Stow Conservation Trust Inc

    EIN 042625752 · Headquarters: STOW, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. Stow Friends of the Council on Aging Inc

    EIN 043000535 · Headquarters: Stow, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  58. Stow Historical Society

    EIN 043273479 · Headquarters: Stow, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Stow Womens Club

    EIN 222570869 · Headquarters: STOW, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  60. Straight Ahead Pictures Inc

    EIN 043022279 · Headquarters: CONWAY, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Strategic Futures Initiative Inc C/o Verdolino & Lowey Pc

    EIN 993647053 · Headquarters: FOXBOROUGH, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Strategies to Enhance Life Forever

    EIN 474281524 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  63. Stratford Foundation Inc

    EIN 041166517 · Headquarters: Needham, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. Streetfeet Workshops Inc

    EIN 222655596 · Headquarters: MILTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ

  65. Striar Center for Compassionate Care

    EIN 462880772 · Headquarters: Canton, MA, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  66. Stripers Forever

    EIN 721562209 · Headquarters: Newbury, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  67. Stronger Nation Fund Inc

    EIN 934774155 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Student Chapter American Veterinary Medical Assoc

    EIN 474991221 · Headquarters: North Grafton, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  69. Study-retreat Associates of Rolling Ridge Incorporated

    EIN 550663769 · Headquarters: North Andover, MA, United States · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  70. Sturbridge Nursery School Inc

    EIN 042430288 · Headquarters: STURBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  71. Sturbridge Youth Basketball Association Inc

    EIN 460841400 · Headquarters: sturbridge, MA, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  72. Sturdy Health Inc

    EIN 042709501 · Headquarters: ATTLEBORO, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  73. Subud United States of America

    EIN 462072346 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  74. Sudbury Chamber of Commerce

    EIN 043143863 · Headquarters: SUDBURY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  75. Sudbury Cooperative Preschool Inc

    EIN 042265860 · Headquarters: Sudbury, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Sudbury Earth Decade Committee

    EIN 043210337 · Headquarters: Sudbury, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Sudbury Education Association

    EIN 237132796 · Headquarters: Shrewsbury, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Sudbury Permanent Firefighters Association Iaff Local 2023

    EIN 510226959 · Headquarters: SUDBURY, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  79. Sudbury River Tennis Club Inc

    EIN 237140870 · Headquarters: Framingham, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  80. Sudbury Swim & Tennis

    EIN 042428007 · Headquarters: SUDBURY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Sudbury Swim Team Inc

    EIN 042900954 · Headquarters: Sudbury, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  82. Sudbury Valley School Inc

    EIN 042457051 · Headquarters: FRAMINGHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  83. Suffolk District Medical Society

    EIN 042483879 · Headquarters: WALTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  84. Sulmona Sport Association Inc

    EIN 237206460 · Headquarters: BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Summit Association of Ri for the Handicapped

    EIN 056018719 · Headquarters: SWANSEA, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  86. Sumner M Redstone Charitable Foundation

    EIN 222761621 · Headquarters: CHESTNUT HILL, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  87. Sun Valley Associates Inc

    EIN 042302721 · Headquarters: LEXINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Suncook Montessori

    EIN 853819734 · Headquarters: BELMONT, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  89. Sunflower Foundation

    EIN 952644098 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  90. Sunnyside Educational Center

    EIN 222596540 · Headquarters: SOUTHBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  91. Sunrise Classic Incorporated

    EIN 333115775 · Headquarters: Concord, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Sunrise Pws Inc

    EIN 863364138 · Headquarters: NORTH CHATHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Sunrise Taekwondo Warriors Booster Club Inc

    EIN 392189061 · Headquarters: South Hadley, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Sunsat Energy Council

    EIN 521134983 · Headquarters: WAYLAND, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Sunshine Club at Norwell Gardens

    EIN 300334914 · Headquarters: Norwell, MA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  96. Supporting Resilient Communities Inc

    EIN 821232506 · Headquarters: Monson, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Supreme Council of Sovereign Grand Inspectors General for the Nmj

    EIN 041032821 · Headquarters: LEXINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. Supreme Council of the Royal Arcanum

    EIN 041885430 · Headquarters: Boston, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  99. Supreme Council of the Royal Arcanum

    EIN 042799347 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Supreme Council of the Royal Arcanum

    EIN 043269563 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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