Mutual & Membership Benefit nonprofits in Connecticut

Mutual & Membership Benefit nonprofits in Connecticut. Browse 477 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. Knights of Columbus

    EIN 237541329 · Headquarters: Branford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Knights of Columbus

    EIN 237541339 · Headquarters: Uncasville, CT, US · Mutual & Membership Benefit · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  3. Knights of Columbus

    EIN 237541340 · Headquarters: Newtown, CT, US · Mutual & Membership Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  4. Knights of Columbus

    EIN 237541341 · Headquarters: Ridgefield, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Knights of Columbus

    EIN 237541345 · Headquarters: Winsted, CT, US · Mutual & Membership Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  6. Knights of Columbus

    EIN 237541346 · Headquarters: Westport, CT, US · Mutual & Membership Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  7. Knights of Columbus

    EIN 237541352 · Headquarters: New Canaan, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Knights of Columbus

    EIN 237541364 · Headquarters: Chester, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Knights of Columbus

    EIN 237541402 · Headquarters: Colchester, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  10. Knights of Columbus

    EIN 237543932 · Headquarters: New Haven, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  11. Knights of Columbus

    EIN 237546543 · Headquarters: Bristol, CT, US · Mutual & Membership Benefit · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  12. Knights of Columbus

    EIN 237546548 · Headquarters: Stratford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Knights of Columbus

    EIN 237546561 · Headquarters: Greenwich, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  14. Knights of Columbus

    EIN 260602562 · Headquarters: West Haven, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Knights of Columbus

    EIN 263548352 · Headquarters: Derby, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Knights of Columbus

    EIN 271233863 · Headquarters: Stamford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  17. Knights of Columbus

    EIN 320417306 · Headquarters: Dayville, CT, US · Mutual & Membership Benefit · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  18. Knights of Columbus

    EIN 331215210 · Headquarters: New Haven, CT, US · Mutual & Membership Benefit · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  19. Knights of Columbus

    EIN 352376569 · Headquarters: Manchester, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Knights of Columbus

    EIN 352390799 · Headquarters: Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  21. Knights of Columbus

    EIN 463226404 · Headquarters: WILTON, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Knights of Columbus

    EIN 471038629 · Headquarters: Bethany, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Knights of Columbus

    EIN 522091028 · Headquarters: Derby, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  24. Knights of Columbus

    EIN 542167096 · Headquarters: New Haven, CT, US · Mutual & Membership Benefit · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  25. Knights of Columbus

    EIN 562567420 · Headquarters: Middletown, CT, US · Mutual & Membership Benefit · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  26. Knights of Columbus

    EIN 611743713 · Headquarters: Norwich, CT, US · Mutual & Membership Benefit · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  27. Knights of Columbus

    EIN 800953201 · Headquarters: Marlborough, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Knights of Columbus

    EIN 900544417 · Headquarters: Torrington, CT, US · Mutual & Membership Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  29. Knights of Columbus

    EIN 900577252 · Headquarters: East Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  30. Knights of Columbus

    EIN 900624310 · Headquarters: Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  31. Knights of Columbus

    EIN 912002193 · Headquarters: Branford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  32. Knights of Columbus 2616 Father Coleman Council

    EIN 237142938 · Headquarters: FAIRFIELD, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  33. Knights of Columbus 3594 St Pius X Council

    EIN 222804016 · Headquarters: WATERTOWN, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Knights of Columbus Father Reagan Council 3300

    EIN 060773430 · Headquarters: north branford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  35. Knights of Columbus Msgr Greylish Council 3675 Building Association

    EIN 060777118 · Headquarters: New Britain, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Knights of Columbus No 2370 St James

    EIN 060847996 · Headquarters: Stratford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Knights of Columbus St Anne Council 6119

    EIN 237541403 · Headquarters: WEST HARTFORD, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2017 · Primary form: IRS Form 990-EZ

  38. Knights of Columbus the Rev Monsignor Patrick Mcgivney

    EIN 900245409 · Headquarters: Bridgeport, CT, US · Mutual & Membership Benefit · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  39. Knights of Columbus Tinto Council 47

    EIN 061507314 · Headquarters: Milford, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2015 · Primary form: IRS Form 990-EZ

  40. Knights of Pythias - John Hay Lodge #61

    EIN 061349407 · Headquarters: WEST HARTFORD, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  41. Knights of the York Cross of Honour Convent General

    EIN 237532669 · Headquarters: Stratford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Knights of Vartan Inc

    EIN 237616087 · Headquarters: EAST HARTFORD, CT, US · Mutual & Membership Benefit · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  43. Knights Templar of the United States of America

    EIN 066046554 · Headquarters: Brookfield, CT, US · Mutual & Membership Benefit · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  44. Knights Templar of the United States of America

    EIN 066051084 · Headquarters: Waterbury, CT, US · Mutual & Membership Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  45. Kol Haverim Cemetery Association Inc

    EIN 061528966 · Headquarters: Glastonbury, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Kpcla Ladies of Grace Divison 4Th Degree Sister Dolores Harrall

    EIN 472143125 · Headquarters: HARTFORD, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Law Enforcement Alliance of Southington Veba Trust Fund

    EIN 813385432 · Headquarters: SOUTHINGTON, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Lawn Cemetery Association Inc C/o Edmund Conklin

    EIN 066048993 · Headquarters: SHELTON, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990

  49. Le Grand Orient Des Haitiens Damerique Sc Des 33Rd Inc

    EIN 263086881 · Headquarters: stratford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  50. Lion of Ct Incorporated

    EIN 831477442 · Headquarters: NEW HAVEN, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  51. Lithuanian Cemetery Association

    EIN 066181332 · Headquarters: Terryville, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Local 1253 Health & Welfare Fund

    EIN 016029461 · Headquarters: Wallingford, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2014 · Primary form: IRS Form 990

  53. Loyal Orange Institution of the USA 117 Washington

    EIN 066057742 · Headquarters: MANCHESTER, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. Luke a Lockwood Council Amd

    EIN 883215448 · Headquarters: Stratford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Manchester Police Benevolent Officers Association Inc

    EIN 061333040 · Headquarters: Manchester, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Marlborough Lodge No 1631 Loyal Order of Moose Inc

    EIN 066075578 · Headquarters: MARLBOROUGH, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2013 · Primary form: IRS Form 990-EZ

  57. Masonic Hall Association of West

    EIN 060772505 · Headquarters: WEST HARTFORD, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2012 · Primary form: IRS Form 990-EZ

  58. Masonic Temple Corporation of Stonington

    EIN 066088890 · Headquarters: Mystic, CT, US · Mutual & Membership Benefit · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  59. Masonichip International Inc

    EIN 202523811 · Headquarters: Newington, CT, US · Mutual & Membership Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  60. Medical and Dental Plan for Union Employees of Aquarion Water Compan

    EIN 900177929 · Headquarters: BRIDGEPORT, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  61. Middlebury Cemetery Assoc Inc

    EIN 066049076 · Headquarters: MIDDLEBURY, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. Middletown Ct Tiller Association Inc

    EIN 882645418 · Headquarters: MIDDLETOWN, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Milford Side Burying Ground Association

    EIN 066100638 · Headquarters: Woodbridge, CT, US · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Military Order of the Cootie of the United States

    EIN 061056320 · Headquarters: new london, CT, US · Mutual & Membership Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  65. Mitchell Family Fundraisers

    EIN 421786688 · Headquarters: Norwalk, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. MKC Club Inc

    EIN 060811229 · Headquarters: Milford, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2015 · Primary form: IRS Form 990-EZ

  67. Monroe Center Cemetery Association

    EIN 066047306 · Headquarters: BRIDGEPORT, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Monroe Seniors Benefit Fund Inc

    EIN 061371750 · Headquarters: Monroe, CT, US · Mutual & Membership Benefit · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  69. Montgomery Masonic Temple Association Inc

    EIN 060884914 · Headquarters: West Cornwall, CT, US · Mutual & Membership Benefit · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  70. Morningside Cemetery Association of Gaylordville Connecticut

    EIN 066042510 · Headquarters: Gaylordsville, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  71. Most Royal Prince Hall Grand Court Order of Cyrene

    EIN 061433351 · Headquarters: Meriden, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Mason of Ct Inc

    EIN 223281653 · Headquarters: Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  73. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 060966615 · Headquarters: Ansonia, CT, US · Mutual & Membership Benefit · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  74. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 061270863 · Headquarters: NEW HAVEN, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  75. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 061313142 · Headquarters: South Windsor, CT, US · Mutual & Membership Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  76. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 061339706 · Headquarters: Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  77. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 061347664 · Headquarters: HARTFORD, CT, US · Mutual & Membership Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  78. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 061453669 · Headquarters: New Haven, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2010 · Primary form: IRS Form 990-EZ

  79. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 061454920 · Headquarters: West Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  80. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 066055264 · Headquarters: Middletown, CT, US · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 222582936 · Headquarters: Middletown, CT, US · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223205884 · Headquarters: NEW BRITAIN, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  83. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223205887 · Headquarters: NORWALK, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  84. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223205890 · Headquarters: Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  85. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223205893 · Headquarters: BRIDGEPORT, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  86. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281647 · Headquarters: Waterbury, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281651 · Headquarters: SOUTH NORWALK, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  88. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281652 · Headquarters: Bridgeport, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  89. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281655 · Headquarters: New Haven, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  90. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281657 · Headquarters: hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  91. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281659 · Headquarters: New Haven, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  92. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281663 · Headquarters: New London, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  93. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281664 · Headquarters: Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  94. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281665 · Headquarters: New Haven, CT, US · Mutual & Membership Benefit · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  95. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281667 · Headquarters: Middletown, CT, US · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281668 · Headquarters: Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  97. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 223281669 · Headquarters: Stamford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  98. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 237300154 · Headquarters: Hartford, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  99. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 237636185 · Headquarters: NEW HAVEN, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  100. Most Worshipful Prince Hall Grd Ldg of Free and Acptd Masons of Ct Inc

    EIN 911924664 · Headquarters: Bridgeport, CT, US · Mutual & Membership Benefit · Latest available filing year: 2009 · Primary form: IRS Form 990-N

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