Nonprofits in Connecticut

Nonprofits in Connecticut. Browse 26,993 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. The Main Street Singers Inc

    EIN 260499321 · Headquarters: New Britain, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  2. The Maisie Foundation Inc

    EIN 472384106 · Headquarters: HARTFORD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  3. The Manafort Family Foundation Inc

    EIN 061412557 · Headquarters: PLAINVILLE, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  4. The Manchester Ski Club Inc

    EIN 222568684 · Headquarters: Manchester, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. The Mandi Schwartz Foundation Inc

    EIN 453703882 · Headquarters: NEW HAVEN, CT, US · Health Care · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  6. The Marcia a Barris and Joseph F Walton Foundation Inc

    EIN 260778829 · Headquarters: NEW HAVEN, CT, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  7. The Marealle Ndu Foundation Inc

    EIN 852044513 · Headquarters: Milford, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. The Maren Foundation

    EIN 814295288 · Headquarters: Darien, CT, USA · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  9. The Margaret Dunn Smith Family Foundation Inc

    EIN 202642871 · Headquarters: MORRIS, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  10. The Marie & Pat Ciochetti Foundation Inc

    EIN 320235077 · Headquarters: WATERBURY, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. The Maritime Aquarium at Norwalk Inc

    EIN 061062912 · Headquarters: NORWALK, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. The Mark Twain Memorial

    EIN 060685118 · Headquarters: HARTFORD, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990

  13. The Mark W Blackman & Deborah Blackman Family Foundation

    EIN 824393686 · Headquarters: DARIEN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  14. The Marks Foundation

    EIN 133933322 · Headquarters: WESTPORT, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2021 · Primary form: IRS Form 990-PF

  15. The Martello Family Foundation

    EIN 874020692 · Headquarters: WESTPORT, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  16. The Martha and Hunter Grubb Foundation Inc

    EIN 510201970 · Headquarters: WEST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  17. The Martin V Alonzo Family Found C/o Marlene Alonzo Director

    EIN 261623392 · Headquarters: GREENWICH, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  18. The Martina Foundation Inc

    EIN 061472279 · Headquarters: BETHLEHEM, CT, USA · Animal Related · Latest available filing year: 2014 · Primary form: IRS Form 990-EZ

  19. The Martino Family Foundation Co Michael E Martino

    EIN 456635594 · Headquarters: NEW CANAAN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  20. The Marvin Sirot Charitable Foundation

    EIN 133189395 · Headquarters: STAMFORD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2016 · Primary form: IRS Form 990-PF

  21. The Mary a Schmecker Turtle Shell Fund Inc

    EIN 272238388 · Headquarters: SHELTON, CT, USA · Animal Related · Latest available filing year: 2015 · Primary form: IRS Form 990-EZ

  22. The Mary Ann and Lawrence Tucker Foundation

    EIN 542140479 · Headquarters: GREENWICH, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  23. The Mary Elizabeth and Gordon B Mannweiler Foundation Inc

    EIN 061221118 · Headquarters: BETHLEHEM, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  24. The Mary K and Walter M Miller Family Foundation Inc

    EIN 061558950 · Headquarters: DARIEN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  25. The Mary Wade Home Incorporated

    EIN 060662192 · Headquarters: NEW HAVEN, CT, USA · Health Care · Latest available filing year: 2023 · Primary form: IRS Form 990

  26. The Maryann Loprete Memorial Foundation Inc

    EIN 455582427 · Headquarters: WETHERSFIELD, CT, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. The Masonic Building Corporation

    EIN 870789970 · Headquarters: Griswold, CT, USA · Mutual & Membership Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  28. The Masonic Club of New London Inc

    EIN 066048477 · Headquarters: Pawcatuck, CT, US · Mutual & Membership Benefit · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  29. The Masooli Project

    EIN 061005031 · Headquarters: SIMSBURY, CT, USA · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  30. The Master's School

    EIN 237016084 · Headquarters: WEST SIMSBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. The Mat Charitable Foundation Inc C/o William T Mccallum Cpa Pc

    EIN 136991067 · Headquarters: WESTPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  32. The Matschullat Family Foundation

    EIN 137299030 · Headquarters: GREENWICH, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  33. The Matthew Gaffney Foundation

    EIN 550842939 · Headquarters: STAMFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  34. The Matthew Jones-robert Jenkins Foundation Inc

    EIN 061408106 · Headquarters: BRIDGEPORT, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  35. The Mattis Family Foundation

    EIN 352765948 · Headquarters: GREENWICH, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  36. The Maurice C La Grua Center

    EIN 260301258 · Headquarters: STONINGTON, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. The Maurice Sendak Foundation Inc

    EIN 133807627 · Headquarters: RIDGEFIELD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  38. The Max Showalter Foundation Inc C/o W Campbell Hudson Iii

    EIN 061533192 · Headquarters: ESSEX, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  39. The Maximilian E and Marion O Hoffman Foundation Inc

    EIN 222648036 · Headquarters: WEST HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  40. The Maybell Family Foundation Inc

    EIN 134346707 · Headquarters: Darien, CT, USA · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  41. The Maychip Family Foundation Inc

    EIN 223720987 · Headquarters: GREENWICH, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2013 · Primary form: IRS Form 990-PF

  42. The Mayer Family Foundation

    EIN 133531984 · Headquarters: Greenwich, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  43. The Mayors Program for Manchester Children Inc

    EIN 061479037 · Headquarters: MANCHESTER, CT, USA · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  44. The Mazaika Family Foundation Inc

    EIN 061469327 · Headquarters: BETHLEHEM, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  45. The McAvity Family Foundation

    EIN 263887979 · Headquarters: Greenwich, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  46. The Mccaffrey Family Foundation

    EIN 061627741 · Headquarters: REDDING, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  47. The Mcinerney Family Foundation

    EIN 133949885 · Headquarters: WESTPORT, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  48. The Mcintyre Family Foundation Inc

    EIN 873159620 · Headquarters: DARIEN, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  49. The Mckenzie Foundation Inc

    EIN 061508410 · Headquarters: GREENWICH, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  50. The Mcmaster Family Foundation Inc

    EIN 030577385 · Headquarters: RIDGEFIELD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  51. The Mcnelis Family Foundation Inc Co Greg Mcnelis

    EIN 262409752 · Headquarters: RIDGEFIELD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2014 · Primary form: IRS Form 990-PF

  52. The Mead School for Human Development Inc

    EIN 060869691 · Headquarters: STAMFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. The Mead School Foundation Inc

    EIN 061584857 · Headquarters: STAMFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. The Meera & Ashok Vasudevan Foundation C/o Trove Fs Llc

    EIN 477154309 · Headquarters: STAMFORD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  55. The Meier and Linnartz Family Foundation C/o John Linnartz

    EIN 800901232 · Headquarters: New Canaan, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  56. The Melissa Marottoli Hogan Foundation

    EIN 800950665 · Headquarters: BRANFORD, CT, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. The Melville Charitable Trust Inc

    EIN 461670702 · Headquarters: NEW HAVEN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  58. The Mendelssohn Choir of Connecticut

    EIN 061185461 · Headquarters: Fairfield, CT, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. The Mercy Hospital Inc

    EIN 043398280 · Headquarters: HARTFORD, CT, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. The Meredith and Whitney George Family Foundation Inc

    EIN 830414025 · Headquarters: DARIEN, CT, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  61. The Meriden Junior Football League Incorporated

    EIN 364766125 · Headquarters: meriden, CT, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. The Meriden-wallingford Community Foundation

    EIN 061484149 · Headquarters: MERIDEN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. The Merkin Ertman Foundation Trust

    EIN 936811604 · Headquarters: WEST HARTFORD, CT, USA · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  64. The Metro Ny Assn for Applied Psychology Co Nicole Keyser

    EIN 237064378 · Headquarters: GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  65. The Meyer Family Charitable Trust Ua 12-17-13

    EIN 467190125 · Headquarters: DARIEN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  66. The Mhg Foundation Inc

    EIN 201993159 · Headquarters: OLD GREENWICH, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  67. The Mianus River Boat & Yacht Club Inc

    EIN 061284766 · Headquarters: Cos Cob, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. The Michael & Carol Lowenstein Foundation Inc

    EIN 205953051 · Headquarters: GREENWICH, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  69. The Michael Bolton Charities Inc

    EIN 061367576 · Headquarters: WALLINGFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. The Michael Finkelstein and Sue-ann Friedman Foundation Inc

    EIN 223477816 · Headquarters: STAMFORD, CT, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  71. The Michael M Wiseman and Helen a Garten Charitable Foundation

    EIN 134149893 · Headquarters: STONINGTON, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  72. The Michael P Doyle Memorial Foundation Inc

    EIN 872076622 · Headquarters: DURHAM, CT, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  73. The Mickey Lione Jr Fund Inc

    EIN 141919346 · Headquarters: STAMFORD, CT, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. The Middle Haddam Public Library Inc

    EIN 060789488 · Headquarters: Middle Haddam, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. The Middlefield Volunteer Fire Company Incorporated

    EIN 472195001 · Headquarters: MIDDLEFIELD, CT, USA · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. The Middlesex Club Inc

    EIN 060792535 · Headquarters: DARIEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. The Middletown Rifle and Revolver Club Inc

    EIN 061474753 · Headquarters: Middletown, CT, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. The Middletown Yacht Club

    EIN 060452643 · Headquarters: Chester, CT, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. The Mike and Charlotte Delaney Foundation

    EIN 133437923 · Headquarters: OLD GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  80. The Mikey Czech Foundation Inc

    EIN 262358345 · Headquarters: NEW CANAAN, CT, USA · Medical Research · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  81. The Milbrook Club Inc

    EIN 060453148 · Headquarters: GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. The Milford Bank Foundation Inc

    EIN 020600478 · Headquarters: MILFORD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  83. The Milford Fine Arts Council Inc

    EIN 237401211 · Headquarters: MILFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. The Milford Historical Society Incorporated

    EIN 066358697 · Headquarters: Milford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. The Milford Hospital Inc

    EIN 060646741 · Headquarters: MILFORD, CT, US · Health Care · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  86. The Miller Charitable Trust

    EIN 926050257 · Headquarters: Old Greenwich, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  87. The Milton and Ella Upsher Foundation

    EIN 137102549 · Headquarters: GREENWICH, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2018 · Primary form: IRS Form 990-PF

  88. The Milton Public Hall Association

    EIN 061601176 · Headquarters: Litchfield, CT, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. The Ministry of the Open Door Inc

    EIN 061373799 · Headquarters: HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. The Missing Link Foundation Inc

    EIN 454100140 · Headquarters: NORTHFORD, CT, US · Crime & Legal Related · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  91. The Modern Ancestral Foundation Inc

    EIN 395100661 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. The Modigliani Initiative Inc

    EIN 863426908 · Headquarters: Stamford, CT, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. The Molly Ann Tango Memorial Foundation Inc

    EIN 432040949 · Headquarters: RIDGEFIELD, CT, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990

  94. The Monroe Newcomers & Neighbors Club Inc

    EIN 061273090 · Headquarters: Monroe, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. The Montgomery Family Foundation

    EIN 266620815 · Headquarters: EAST LYME, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  96. The Moritz Foundation

    EIN 066504115 · Headquarters: NEW HAVEN, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2018 · Primary form: IRS Form 990-PF

  97. The Morton & Dinah Danseyar Family Foundation Inc

    EIN 061359689 · Headquarters: ENFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  98. The Morton Family Foundation Inc

    EIN 204095302 · Headquarters: FAIRFIELD, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2016 · Primary form: IRS Form 990-PF

  99. The Morton Schindel Foundation Inc

    EIN 061388538 · Headquarters: WESTON, CT, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2015 · Primary form: IRS Form 990-PF

  100. The Mory's Association Inc

    EIN 060460080 · Headquarters: NEW HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

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