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. Soccer Academy Ne Inc

    EIN 883528723 · Headquarters: NATICK, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  2. Social Club of Pawtucketville

    EIN 041186860 · Headquarters: DRACUT, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  3. Social Committee of Glen Ellen

    EIN 332074679 · Headquarters: Millis, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Social Impact Partners

    EIN 921203692 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  5. Social Science Research & Evaluation Inc

    EIN 222551337 · Headquarters: Lincoln, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Social Structural Research Inc

    EIN 042711980 · Headquarters: Cambridge, MA, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  7. Social Works Spirit Vale Do Amanhecer Andaro Inc

    EIN 995120294 · Headquarters: LEOMINSTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  8. Socially Liberal Fiscally Conservative Policy Education Cent

    EIN 812856260 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  9. Society for Christian Activities

    EIN 046130444 · Headquarters: FORESTDALE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Society for Neuroscience

    EIN 043158207 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Society for Neuroscience

    EIN 474832097 · Headquarters: Amherst, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 042447989 · Headquarters: Melrose, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 042448095 · Headquarters: Barre, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 042697144 · Headquarters: Eastham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 042938886 · Headquarters: Lowell, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Society for Preservation & Encourmt of Barbershop Quartet Singing Amer

    EIN 046112785 · Headquarters: HINGHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Society for the Preservation and Encouragement of Barbershop Quart

    EIN 046114800 · Headquarters: Housatonic, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Society for Women in Marine Science Inc

    EIN 845004785 · Headquarters: barnstable, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Society in Dedham for Apprehending Horse Thieves

    EIN 046086784 · Headquarters: Dedham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Society of Colonial Wars in the Commonwealth of Ma

    EIN 046049519 · Headquarters: BOSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  21. Society of Fire Protection Engineers - New England

    EIN 056018806 · Headquarters: NORWOOD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Society of Manufacturing Engineers

    EIN 046130041 · Headquarters: Shrewsbury, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Society of Manufacturing Engineers

    EIN 046156951 · Headquarters: Needham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Society of Phi Zeta

    EIN 223103622 · Headquarters: North Grafton, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  25. Society of Plastics Engineers

    EIN 046130445 · Headquarters: Tyngsboro, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  26. Society of Plastics Engineers Blow Moulding Division

    EIN 237283048 · Headquarters: FITCHBURG, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  27. Society of Printers

    EIN 237059837 · Headquarters: Dedham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Society of Professional Journalists

    EIN 202766839 · Headquarters: Salem, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. Society of Saint Vincent De Paul

    EIN 465464618 · Headquarters: WORCESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  30. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273504692 · Headquarters: ALLSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273504899 · Headquarters: BRIGHTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  32. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273509519 · Headquarters: DORCHESTER, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273509623 · Headquarters: JAMAICA PLAIN, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273509949 · Headquarters: SOUTH BOSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  35. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273510045 · Headquarters: WEST ROXBURY, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273510464 · Headquarters: DORCHESTER, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273512363 · Headquarters: ROCKLAND, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273512569 · Headquarters: HANSON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  39. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273512955 · Headquarters: EAST BRIDGEWATER, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273513996 · Headquarters: BROCKTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273514344 · Headquarters: BROCKTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273518667 · Headquarters: BROCKTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273518815 · Headquarters: HANOVER, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273519034 · Headquarters: KINGSTON, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  45. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273519118 · Headquarters: Danvers, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  46. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273519199 · Headquarters: MARLBOROUGH, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273521236 · Headquarters: WEYMOUTH, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273521315 · Headquarters: BRAINTREE, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273521547 · Headquarters: HINGHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273521659 · Headquarters: NEWTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273521981 · Headquarters: MARSHFIELD, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 273522423 · Headquarters: SCITUATE, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Society of Saint Vincent De Paul in the Archdiocese of Boston

    EIN 274238626 · Headquarters: BRIDGEWATER, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. Society of St Vincent De Paul

    EIN 042104826 · Headquarters: STOUGHTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. Society of St Vincent De Paul Holy Ghost Conference

    EIN 273513234 · Headquarters: WHITMAN, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  56. Society of St Vincent De Paul Immaculate Conception Conference

    EIN 273522071 · Headquarters: MARLBOROUGH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  57. Society of St Vincent De Paul in the Archdiocese of Boston

    EIN 274131172 · Headquarters: STONEHAM, MA, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  58. Society of St Vincent De Paul Mary Queen of Martyrs Conference

    EIN 273511973 · Headquarters: PLYMOUTH, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  59. Society of St Vincent De Paul Sacred Heart Conference

    EIN 273509758 · Headquarters: ROSLINDALE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  60. Society of St Vincent De Paul St Bridget's Conference

    EIN 273518746 · Headquarters: ABINGTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  61. Society of St Vincent De Paul St Margaret Mary of Alacoque Conference

    EIN 273519285 · Headquarters: MIDDLEBORO, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. Society of St Vincent De Paul St Mark Conference

    EIN 273509213 · Headquarters: Dorchester, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  63. Society of St Vincent De Paul St Mary of the Assumption

    EIN 273509064 · Headquarters: BROOKLINE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  64. Society of St Vincent De Paul St Oscar Romero Conference

    EIN 271891316 · Headquarters: CANTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  65. Society of the Companions of the Holy Cross

    EIN 042104932 · Headquarters: BYFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Society of the Companions of the Holy Cross

    EIN 465037959 · Headquarters: Hingham, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Society of the War of 1812 in the Commonwealth of Massachusetts

    EIN 042675541 · Headquarters: SUDBURY, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Society of Two Hundred Gentlemen Senior Golfers Inc

    EIN 136016902 · Headquarters: MARSTONS MILLS, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  69. Society of Women Engineers

    EIN 042797948 · Headquarters: Woburn, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Sociosynergy Inc

    EIN 271030668 · Headquarters: Stoughton, MA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  71. Solar Bill of Rights Committee

    EIN 475011853 · Headquarters: Boston, MA, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  72. Solar for Them Inc

    EIN 844207734 · Headquarters: KINGSTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  73. Soldier for a Soldier Inc

    EIN 833443088 · Headquarters: Kingston, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  74. Sole Sisters Running Club

    EIN 472025833 · Headquarters: Wilmington, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  75. Solomons Temple Lodge a F & a M

    EIN 472389312 · Headquarters: Uxbridge, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Solutions for International Health Care

    EIN 464711097 · Headquarters: Tewksbury, MA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  77. Somerset Firefighters Scholarship and Community Fund

    EIN 043142209 · Headquarters: Somerset, MA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  78. Somerset Friends of Music Inc

    EIN 042623595 · Headquarters: Somerset, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  79. Somerset Historical Society Inc

    EIN 042703972 · Headquarters: Somerset, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Somerset Insurance Underwriters Association Inc

    EIN 264291654 · Headquarters: Somerset, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  81. Somerset Players

    EIN 830382045 · Headquarters: Somerset, MA, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  82. Somerset-berkley Regional High School - Parent Teacher Organizati

    EIN 454308232 · Headquarters: Somerset, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Somerville Chamber of Commerce

    EIN 042038139 · Headquarters: SOMERVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Somerville High School Ptsa

    EIN 831841275 · Headquarters: Somerville, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Somerville Municipal Employees Union Smeu

    EIN 222481223 · Headquarters: MALDEN, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  86. Somerville Police Employees Association

    EIN 043040433 · Headquarters: SOMERVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  87. Somerville-cambridge Elder Services Incorporated

    EIN 042515020 · Headquarters: SOMERVILLE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Songtime Inc

    EIN 237208134 · Headquarters: Centerville, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  89. Sons and Daughters of Hawley Inc

    EIN 042738928 · Headquarters: HAWLEY, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Sons of Amvets Post 2001

    EIN 990907142 · Headquarters: Avon, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Sons of Amvets Squadron 70

    EIN 471089681 · Headquarters: Falmouth, MA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  92. Sons of Amvets Squadron Charter Haverhill 147

    EIN 264746580 · Headquarters: Haverhill, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Sons of Chekka Club Inc

    EIN 043228989 · Headquarters: Mansfield, MA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  94. Sons of Italy 216 Charitable & Educational Trust

    EIN 046718220 · Headquarters: BROCKTON, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  95. Sons of Italy in America

    EIN 010719847 · Headquarters: Lawrence, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Sons of Italy in America

    EIN 030462517 · Headquarters: Norwood, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Sons of Italy in America

    EIN 042238781 · Headquarters: LEE, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Sons of Italy in America

    EIN 042600875 · Headquarters: ARLINGTON, MA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  99. Sons of Italy in America

    EIN 042808242 · Headquarters: Winchester, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Sons of Italy in America

    EIN 043098268 · Headquarters: TAUNTON, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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