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. American Legion Department of Massachusetts Inc

    EIN 041028060 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  2. American Legion Edward J Beatty Po

    EIN 046189299 · Headquarters: CANTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  3. American Legion George B Preston Post 209

    EIN 046189600 · Headquarters: DOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. American Legion George J Morin Post 183 Inc

    EIN 046189355 · Headquarters: SHIRLEY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. American Legion George K Menichios Post 324

    EIN 046189378 · Headquarters: NEEDHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  6. American Legion Hanson Post 226 Inc

    EIN 046189318 · Headquarters: HANSON, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  7. American Legion Inc

    EIN 046115980 · Headquarters: Middleborough, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. American Legion Inc - Post 125

    EIN 042041303 · Headquarters: NORTH ADAMS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. American Legion Inc Chester P Tuttle Post 279

    EIN 042284267 · Headquarters: Auburn, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. American Legion Leo C Roth Post 315

    EIN 046189621 · Headquarters: DRACUT, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  11. American Legion Miller Terrell Post 199

    EIN 042592401 · Headquarters: West Townsend, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. American Legion No 429 Cleghorn

    EIN 046124138 · Headquarters: FITCHBURG, MA, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  13. American Legion Old Hadley Post 271

    EIN 046136566 · Headquarters: Hadley, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  14. American Legion Plymouth Post 40

    EIN 042282218 · Headquarters: PLYMOUTH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. American Legion Post #265

    EIN 042121763 · Headquarters: ACUSHNET, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. American Legion Post #294

    EIN 041637607 · Headquarters: Quincy, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  17. American Legion Post #442

    EIN 046309176 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  18. American Legion Post 120

    EIN 651162423 · Headquarters: HINGHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. American Legion Post 122

    EIN 046170153 · Headquarters: METHUEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. American Legion Post 123

    EIN 046190001 · Headquarters: Ware, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  21. American Legion Post 129

    EIN 041028104 · Headquarters: GARDNER, MA, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  22. American Legion Post 150

    EIN 046190004 · Headquarters: Newburyport, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. American Legion Post 160

    EIN 042121791 · Headquarters: ADAMS, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  24. American Legion Post 217 John Edward Mcneil

    EIN 046189404 · Headquarters: PLAINVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  25. American Legion Post 225

    EIN 046189390 · Headquarters: WRENTHAM, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  26. American Legion Post 227

    EIN 046189426 · Headquarters: MIDDLETON, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  27. American Legion Post 273 Millican-mackenzie

    EIN 046189307 · Headquarters: BURLINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. American Legion Post 3 Capt Lester S Wass

    EIN 042006275 · Headquarters: GLOUCESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. American Legion Post 303

    EIN 046189341 · Headquarters: SWANSEA, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. American Legion Post 308

    EIN 046136567 · Headquarters: ORLEANS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. American Legion Post 386

    EIN 471960122 · Headquarters: East Brookfield, MA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  32. American Legion Post 405

    EIN 046135279 · Headquarters: Raynham, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  33. American Legion Post 45

    EIN 041609295 · Headquarters: MEDFORD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. American Legion Post 462

    EIN 542131316 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  35. American Legion Post 69 -Malden

    EIN 042397800 · Headquarters: MALDEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  36. American Legion Post 8 Andover

    EIN 046189573 · Headquarters: Andover, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. American Legion Post 87

    EIN 264612372 · Headquarters: Lowell, MA, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990

  38. American Legion Post 88

    EIN 046189422 · Headquarters: MARSHFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. American Legion Robert D Pelletier Post 247

    EIN 042307238 · Headquarters: TYNGSBORO, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  40. American Legion Somerville Post #19

    EIN 041028125 · Headquarters: SOMERVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. American Legion Tatnuck Post 288

    EIN 042896236 · Headquarters: Worcester, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  42. American Legion Wilbur M Comeau Post 4

    EIN 040063132 · Headquarters: HAVERHILL, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. American Legion Willimansett Post Dept Mass No 353

    EIN 464524237 · Headquarters: Chicopee, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. American Legion Winthrop Piost 146 Inc

    EIN 823469580 · Headquarters: WINTHROP, MA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  45. American Legion-236 Gerald E Larkin

    EIN 042149806 · Headquarters: HAYDENVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  46. American Lithuanian Naturalization Club

    EIN 041028215 · Headquarters: ATHOL, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  47. AMERICAN MARKETING ASSOCIATION INC Boston Chapter

    EIN 237348824 · Headquarters: Westborough, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  48. American Matthay Association Incorporated

    EIN 237042477 · Headquarters: ACTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. American Medical Womens Association Br39

    EIN 042760721 · Headquarters: NEWTON CENTER, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. American Model Yachting Assn

    EIN 237287839 · Headquarters: WILMINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  51. American Musical Instrument Society Inc

    EIN 132896023 · Headquarters: IPSWICH, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  52. American Nephrology Nurses Association

    EIN 300640657 · Headquarters: Westwood, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. American Optical Foundation

    EIN 046028058 · Headquarters: SOUTHBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  54. American Optometric Student Association Incorporated

    EIN 510195072 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  55. American Orff-schulwerk Association

    EIN 237370951 · Headquarters: Milford, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. American Outlaws Boston Chapter

    EIN 465692049 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. American Physical Therapy Assn Colorado Chapter

    EIN 846034046 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. American Physical Therapy Assoc

    EIN 020357715 · Headquarters: Cambridge, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. American Physical Therapy Association Rhode Island Chapter

    EIN 222777113 · Headquarters: Cambridge, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. American Postal Workers Accident Benefit Association

    EIN 237164244 · Headquarters: WESTFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. American Postal Workers Union

    EIN 237020230 · Headquarters: Fall River, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. American Postal Workers Union

    EIN 237341017 · Headquarters: LYNN, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. American Postal Workers Union

    EIN 237341037 · Headquarters: Gloucester, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. American Postal Workers Union

    EIN 237342343 · Headquarters: South Easton, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  65. American Postal Workers Union Afl-cio 506-244

    EIN 041691746 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  66. American Postal Workers Union Alf-cio

    EIN 612194710 · Headquarters: Plymouth, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. American Postal Workers Union Cmal 4553

    EIN 237345042 · Headquarters: WORCESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  68. American Postal Workers Union Local 497

    EIN 042512175 · Headquarters: SPRINGFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. American Postal Workers Union of Ma

    EIN 237150149 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  70. American Promise Education Fund Inc

    EIN 474601462 · Headquarters: Concord, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  71. American Registry of Medical Assistants Inc

    EIN 066069989 · Headquarters: WESTFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  72. American Rental Association

    EIN 042762016 · Headquarters: Hudson, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. American Rose Society

    EIN 046173033 · Headquarters: Stoneham, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. American Seniors Golf Assoc Inc

    EIN 386091769 · Headquarters: MARSTONS MILLS, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  75. American Soc of Heating Refrigerating & Air Conditioning Engineers-boston

    EIN 046173585 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. American Society for Artificial Internal Organs Inc

    EIN 236400773 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. American Society For Industrial Security ASIS Boston Chapter

    EIN 042612424 · Headquarters: Burlington, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  78. American Society for Neurochemistry

    EIN 237036552 · Headquarters: NEWTON HIGHLANDS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. American Society for Training & Developm

    EIN 042631916 · Headquarters: BARRE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  80. American Society of Charter Life Underwriters Inc Springfield Chap

    EIN 046135040 · Headquarters: Holyoke, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  81. American Society of Craniofacial Surgery Inc

    EIN 954354450 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  82. American Society of Interior Designers New England Chapter

    EIN 237417525 · Headquarters: BOXBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  83. American Society of Law Medicine & Ethics Inc

    EIN 237236339 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. American Society of Maxillofacial Surgeons

    EIN 741362603 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. American Society of Media Photographers Inc

    EIN 222912481 · Headquarters: GLOUCESTER, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. American Statistical Association

    EIN 521665921 · Headquarters: Carlisle, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. American Street Hockey Institute Inc

    EIN 043041022 · Headquarters: WINCHENDON SPRINGS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  88. American String Teachers Association Massachusetts Unit

    EIN 046167806 · Headquarters: Arlington, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. American Surgical Association

    EIN 953126287 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. American Training Inc

    EIN 042662986 · Headquarters: ANDOVER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. American Values Coalition Inc

    EIN 873133577 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  92. American Veterans of World War II

    EIN 237297331 · Headquarters: Millis, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  93. American Volkssport Association Inc

    EIN 043094247 · Headquarters: FALL RIVER, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. American Water Works Association

    EIN 413848364 · Headquarters: Needham, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. American Weston Academy Inc

    EIN 832870107 · Headquarters: WESTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990

  96. American Yacht Club Inc

    EIN 042074119 · Headquarters: Newburyport, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. American Youth Football Inc

    EIN 042619693 · Headquarters: NATICK, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  98. American Youth Football Inc

    EIN 933869535 · Headquarters: Norton, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. American-arab Media Foundation Inc

    EIN 042886432 · Headquarters: WELLESLEY, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-PF

  100. Amerikhana Games on Horseback

    EIN 271565616 · Headquarters: Berkley, MA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

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