Nonprofits in Massachusetts

Nonprofits in Massachusetts. Browse 52,168 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. Old Dartmouth Historical Society

    EIN 042104805 · Headquarters: New Bedford, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Old Deerfield Nursery School Inc

    EIN 043042212 · Headquarters: Deerfield, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  3. Old Farm Inc

    EIN 800681575 · Headquarters: LEXINGTON, MA, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  4. Old Goat Track Club

    EIN 834582821 · Headquarters: Worcester, MA, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. Old Gold Rfc Inc

    EIN 043579855 · Headquarters: Boston, MA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Old Guard Ne

    EIN 300679252 · Headquarters: Hopkinton, MA, US · Public & Societal Benefit · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  7. Old Hill Neighborhood Corporation

    EIN 933020947 · Headquarters: SPRINGFIELD, MA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  8. Old Ladies Against Underwater Garbage Inc

    EIN 392187087 · Headquarters: North Falmouth, MA, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  9. Old Ladies Home Society Inc

    EIN 042104810 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  10. Old Martinians Association of New England

    EIN 471619143 · Headquarters: Lexington, MA, US · Education · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  11. Old Methodist Episcopal Church of Berlin Inc Dba 19 Carter

    EIN 300515317 · Headquarters: Berlin, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Old Mill Point Associates Inc

    EIN 237046597 · Headquarters: West Harwich, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  13. Old Mill Pond Elementary Parents and Teachers Organization Paws

    EIN 831099306 · Headquarters: Palmer, MA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  14. Old North Bridge Hounds Inc

    EIN 042642350 · Headquarters: Berlin, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Old North Bridge Hounds Welfare Foundation Inc

    EIN 823900871 · Headquarters: Berlin, MA, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Old North Illuminated Inc

    EIN 043120688 · Headquarters: BOSTON, MA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Old Parish Preservation Volunteers Inc

    EIN 824534856 · Headquarters: Norwood, MA, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Old Post Road Orchestra Inc

    EIN 043577820 · Headquarters: Spencer, MA, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  19. Old Rochester Community Television

    EIN 010842491 · Headquarters: MATTAPOISETT, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Old Rochester Regional Athletic Booster Club Inc

    EIN 464880742 · Headquarters: MATTAPOISETT, MA, USA · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  21. Old Rochester Youth Baseball Inc

    EIN 275494863 · Headquarters: ROCHESTER, MA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  22. Old Rochester Youth Football Inc

    EIN 203653409 · Headquarters: Mattapoisett, MA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Old Rochester Youth Lacrosse Association

    EIN 263416101 · Headquarters: Mattapoisett, MA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Old Sanawarians of North America Eastern Region

    EIN 833326578 · Headquarters: CHESTNUT HILL, MA, USA · Education · Latest available filing year: 2019 · Primary form: IRS Form 990

  25. Old School Riders

    EIN 260652187 · Headquarters: Attleboro, MA, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  26. Old Silver Beach Homeowners Association Inc

    EIN 042850725 · Headquarters: N FALMOUTH, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  27. Old South Dennis Village Association Inc

    EIN 223241995 · Headquarters: South Dennis, MA, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Old Stoughton Musical Society

    EIN 042576764 · Headquarters: Stoughton, MA, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Old Sturbridge Academy Parent Teacher Scholar Association Inc

    EIN 831076846 · Headquarters: STURBRIDGE, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. Old Sturbridge Inc

    EIN 042104809 · Headquarters: STURBRIDGE, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Old Village Association Inc

    EIN 043356690 · Headquarters: CHATHAM, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  32. Old West End Housing Corporation

    EIN 043141970 · Headquarters: BOSTON, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990

  33. Old West Organ Society Inc

    EIN 042776753 · Headquarters: Boston, MA, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Olde Barnstable and Hyannis Members Association Inc

    EIN 043197339 · Headquarters: Marston Mills, MA, US · Community Improvement & Capacity Building · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  35. Olde Boston Chapter

    EIN 042650813 · Headquarters: Norton, MA, US · Arts, Culture & Humanities · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  36. Olde Essex Stage Company

    EIN 881669627 · Headquarters: LAWRENCE, MA, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Olde Marlborough Inc

    EIN 203119185 · Headquarters: MARLBOROUGH, MA, US · Arts, Culture & Humanities · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  38. Older Womens League

    EIN 042783852 · Headquarters: BOSTON, MA, US · Community Improvement & Capacity Building · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  39. Oldham Elementary School Pto

    EIN 821350198 · Headquarters: NORWOOD, MA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Oldtown Country Club

    EIN 042028288 · Headquarters: NEWBURY, MA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Oldways Preservation and Exchange Trust Inc

    EIN 043031978 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. Oleana Foundation Inc

    EIN 900767509 · Headquarters: Dorchester, MA, US · Education · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  43. Olga Davis Foundation

    EIN 992440433 · Headquarters: Dracut, MA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Olga Dunn Dance Company

    EIN 042646569 · Headquarters: GREAT BARRINGTON, MA, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  45. Olgas List Inc

    EIN 922343692 · Headquarters: Arlington, MA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  46. Olive Branch Fair Trade Inc

    EIN 830972395 · Headquarters: West Tisbury, MA, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Olive Higgins Prouty Foundation Inc C/o Nutter Mcclennen & Fish Llp

    EIN 046046475 · Headquarters: BOSTON, MA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2022 · Primary form: IRS Form 990-PF

  48. Olive in July Inc

    EIN 464571962 · Headquarters: LAWRENCE, MA, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  49. Oliver Ames Baseball Boosters

    EIN 992024547 · Headquarters: North Easton, MA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  50. Oliver Ames Cross Country Boosters

    EIN 331690622 · Headquarters: Easton, MA, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Oliver Ames Football Boosters

    EIN 874045780 · Headquarters: SOUTH EASTON, MA, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Oliver Ames Gymnastics Boosters Inc

    EIN 920304275 · Headquarters: North Easton, MA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Oliver Ames High School Cheer Booster Club Inc

    EIN 923178997 · Headquarters: South Easton, MA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Oliver Ames High School Safe Grad Night

    EIN 272072074 · Headquarters: North Easton, MA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Oliver Ames High School Volleyball Boosters

    EIN 991991595 · Headquarters: North Easton, MA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Oliver Ames Hockey Boosters

    EIN 043200170 · Headquarters: Easton, MA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Oliver Ames Hs Tennis Booster Club Inc

    EIN 933636868 · Headquarters: North Easton, MA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Oliver Ames Lacrosse Boosters Inc

    EIN 881086713 · Headquarters: North Easton, MA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Oliver Ames Wrestling Boosters

    EIN 413965439 · Headquarters: South Easton, MA, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Oliver Ashton Post 343 Inc

    EIN 046190022 · Headquarters: NORTHBRIDGE, MA, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Oliver Killam Private Foundation C/o Law Office of Welch Muzio

    EIN 050566794 · Headquarters: SALEM, MA, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  62. Oliver Smiles Inc

    EIN 991119788 · Headquarters: Swansea, MA, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Oliver White Foundation

    EIN 852070377 · Headquarters: BELMONT, MA, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Olivia Knighton Foundation Inc

    EIN 934148846 · Headquarters: ATTLEBORO, MA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Olivia's Organics Charitable Foundation C/o State Garden Inc

    EIN 204229257 · Headquarters: CHELSEA, MA, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  66. Ollies Angels Foundation Inc

    EIN 332303859 · Headquarters: DUXBURY, MA, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Ollies House Inc

    EIN 814882532 · Headquarters: North Attleboro, MA, US · Housing & Shelter · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  68. Olmsted Gardens Inc C/o the Community Builders Inc

    EIN 050508869 · Headquarters: BOSTON, MA, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. Olmsted Green Skilled Nursing Facility Inc

    EIN 010892964 · Headquarters: Cambridge, MA, US · Health Care · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  70. Olpc Foundation

    EIN 205471780 · Headquarters: CAMBRIDGE, MA, USA · International, Foreign Affairs & National Security · Latest available filing year: 2012 · Primary form: IRS Form 990

  71. Omajays Corp

    EIN 334114691 · Headquarters: HOLBROOK, MA, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  72. Omar Services

    EIN 933891917 · Headquarters: Malden, MA, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Omega Chi Epsilon Chemical Engineering Honor Society

    EIN 742037819 · Headquarters: Lowell, MA, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  74. Omega Fire Ministries Massachusetts Inc

    EIN 301210281 · Headquarters: Brockton, MA, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  75. Omega Manhood Uplift Foundation Inc

    EIN 300365607 · Headquarters: Amherst, MA, US · Education · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  76. Omega Men in Action Inc

    EIN 043522663 · Headquarters: Boston, MA, US · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  77. Omega Psi Phi Fraternity

    EIN 043068191 · Headquarters: Dorchester, MA, US · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  78. Omega Psi Phi Fraternity Delta Chi Chapter

    EIN 046151900 · Headquarters: Springfield, MA, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  79. Omega Psi Phi Fraternity Inc - Gamma Chapter

    EIN 300474575 · Headquarters: Roxbury, MA, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  80. Omega Psi Phi Fraternity Iota Chi Chapter

    EIN 900616903 · Headquarters: cambridge, MA, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  81. Omega Star-child Seminars Aka Light Omega

    EIN 223070052 · Headquarters: AMHERST, MA, USA · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-PF

  82. Omicron Delta Epsilon Internatioanl Honor Society in Economics Inc

    EIN 742592896 · Headquarters: Waltham, MA, US · Education · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  83. Omicron Delta Epsilon International Honor Society in Economics Inc

    EIN 460498983 · Headquarters: N Dartmouth, MA, US · Education · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  84. Omicron Delta Epsilon International Honor Society in Economics Inc

    EIN 742592849 · Headquarters: Fitchburg, MA, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  85. Omicron Delta Epsilon International Honor Society in Economics Inc

    EIN 742592850 · Headquarters: Boston, MA, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  86. Omicron Delta Epsilon International Honor Society in Economics Inc

    EIN 742592859 · Headquarters: Boston, MA, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  87. Omicron Delta Epsilon International Honor Society in Economics Inc

    EIN 742592891 · Headquarters: Worcester, MA, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  88. Omicron Delta Epsilon Intl Honor Society in Economics Inc

    EIN 237348213 · Headquarters: Dudley, MA, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  89. Omicron Delta Epsilon Intl Honor Society in Economics Inc

    EIN 742593129 · Headquarters: Amherst, MA, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  90. Omicron Kappa Upsilon Honorary Dental Society Supreme

    EIN 046142490 · Headquarters: Boston, MA, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. Omni Med Inc

    EIN 043409072 · Headquarters: Auburndale, MA, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. Omni Theatre Inc

    EIN 843603472 · Headquarters: BEVERLY, MA, US · Arts, Culture & Humanities · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  93. Omnipoint Technology Digital Equity Inc

    EIN 931700777 · Headquarters: Springfield, MA, USA · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  94. On Board Inc

    EIN 043361590 · Headquarters: SPRINGFIELD, MA, US · Arts, Culture & Humanities · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  95. On Common Ground Inc

    EIN 270231035 · Headquarters: Attleboro, MA, USA · Human Services · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  96. On Guard Initiative Inc

    EIN 465699313 · Headquarters: Uxbridge, MA, US · Mental Health & Crisis Intervention · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  97. On Luck Housing Development Inc

    EIN 042647967 · Headquarters: BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. On N on Foundation Inc

    EIN 823666273 · Headquarters: Longmeadow, MA, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. On Pace with Mylli

    EIN 300746413 · Headquarters: Hyde Park, MA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  100. On Par Cars for Life Inc

    EIN 833236424 · Headquarters: Worcester, MA, US · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990-N

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