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. Knights of Columbus

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

  2. Knights of Columbus

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

  3. Knights of Columbus

    EIN 237541347 · Headquarters: Shelton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Knights of Columbus

    EIN 237541350 · Headquarters: Mystic, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Knights of Columbus

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

  6. Knights of Columbus

    EIN 237541361 · Headquarters: TRUMBULL, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Knights of Columbus

    EIN 237541362 · Headquarters: Old Saybrook, CT, US · Unknown & Unclassified · 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 237541365 · Headquarters: Windsor, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Knights of Columbus

    EIN 237541372 · Headquarters: Westport, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Knights of Columbus

    EIN 237541376 · Headquarters: Guilford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Knights of Columbus

    EIN 237541378 · Headquarters: Middlebury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Knights of Columbus

    EIN 237541379 · Headquarters: BRIDGEPORT, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Knights of Columbus

    EIN 237541385 · Headquarters: COVENTRY, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Knights of Columbus

    EIN 237541386 · Headquarters: Groton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Knights of Columbus

    EIN 237541388 · Headquarters: Avon, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Knights of Columbus

    EIN 237541396 · Headquarters: Niantic, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Knights of Columbus

    EIN 237541399 · Headquarters: TRUMBULL, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Knights of Columbus

    EIN 237541401 · Headquarters: Monroe, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Knights of Columbus

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

  21. Knights of Columbus

    EIN 237541408 · Headquarters: Suffield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Knights of Columbus

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

  23. Knights of Columbus

    EIN 237546533 · Headquarters: Portland, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Knights of Columbus

    EIN 237546535 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  25. Knights of Columbus

    EIN 237546539 · Headquarters: Winsted, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  26. Knights of Columbus

    EIN 237546542 · Headquarters: TRUMBULL, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Knights of Columbus

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

  28. Knights of Columbus

    EIN 237546546 · Headquarters: Terryville, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Knights of Columbus

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

  30. Knights of Columbus

    EIN 237546550 · Headquarters: Shelton, CT, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Knights of Columbus

    EIN 237546551 · Headquarters: Enfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Knights of Columbus

    EIN 237546552 · Headquarters: Taftville, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  33. Knights of Columbus

    EIN 237546554 · Headquarters: Sandy Hook, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Knights of Columbus

    EIN 237546557 · Headquarters: Southington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Knights of Columbus

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

  36. Knights of Columbus

    EIN 237546564 · Headquarters: TRUMBULL, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. Knights of Columbus

    EIN 237546566 · Headquarters: Plainville, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Knights of Columbus

    EIN 237546568 · Headquarters: Wolcott, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Knights of Columbus

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

  40. Knights of Columbus

    EIN 260696768 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Knights of Columbus

    EIN 261098014 · Headquarters: Roxbury, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  42. Knights of Columbus

    EIN 263007907 · Headquarters: HIGGANUM, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  43. Knights of Columbus

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

  44. Knights of Columbus

    EIN 263576156 · Headquarters: Wallingford, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  45. Knights of Columbus

    EIN 264004543 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Knights of Columbus

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

  47. Knights of Columbus

    EIN 271749851 · Headquarters: TOLLAND, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Knights of Columbus

    EIN 273470333 · Headquarters: NEWTOWN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  49. Knights of Columbus

    EIN 273486316 · Headquarters: Wethersfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Knights of Columbus

    EIN 273564866 · Headquarters: Madison, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Knights of Columbus

    EIN 300891734 · Headquarters: Fairfield, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  52. Knights of Columbus

    EIN 301213197 · Headquarters: Bristol, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Knights of Columbus

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

  54. Knights of Columbus

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

  55. Knights of Columbus

    EIN 352295175 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Knights of Columbus

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

  57. Knights of Columbus

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

  58. Knights of Columbus

    EIN 352623201 · Headquarters: CANAAN, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Knights of Columbus

    EIN 364694840 · Headquarters: Baltic, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Knights of Columbus

    EIN 364840319 · Headquarters: Orange, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Knights of Columbus

    EIN 392072787 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Knights of Columbus

    EIN 412074791 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Knights of Columbus

    EIN 432007252 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  64. Knights of Columbus

    EIN 450505787 · Headquarters: Woodbury, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  65. Knights of Columbus

    EIN 450536585 · Headquarters: Waterbury, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  66. Knights of Columbus

    EIN 452639672 · Headquarters: Waterbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Knights of Columbus

    EIN 461467937 · Headquarters: WEST HAVEN, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  68. Knights of Columbus

    EIN 463157115 · Headquarters: WILLIMANTIC, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Knights of Columbus

    EIN 463189165 · Headquarters: Farmington, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Knights of Columbus

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

  71. Knights of Columbus

    EIN 463839397 · Headquarters: Waterbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Knights of Columbus

    EIN 464245708 · Headquarters: East Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  73. Knights of Columbus

    EIN 464473709 · Headquarters: Colcheste, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Knights of Columbus

    EIN 465309788 · Headquarters: Bethel, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Knights of Columbus

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

  76. Knights of Columbus

    EIN 471943125 · Headquarters: WATERBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  77. Knights of Columbus

    EIN 472354603 · Headquarters: Cromwell, CT, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  78. Knights of Columbus

    EIN 473842097 · Headquarters: Southington, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  79. Knights of Columbus

    EIN 474404494 · Headquarters: Niantic, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Knights of Columbus

    EIN 475081022 · Headquarters: Newington, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Knights of Columbus

    EIN 521556824 · Headquarters: Winsted, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  82. Knights of Columbus

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

  83. Knights of Columbus

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

  84. Knights of Columbus

    EIN 561739883 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Knights of Columbus

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

  86. Knights of Columbus

    EIN 571124699 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Knights of Columbus

    EIN 571238227 · Headquarters: Shelton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. Knights of Columbus

    EIN 611577066 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Knights of Columbus

    EIN 611707838 · Headquarters: Bridgeport, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  90. Knights of Columbus

    EIN 611743086 · Headquarters: Plainfield, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  91. Knights of Columbus

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

  92. Knights of Columbus

    EIN 800887286 · Headquarters: Storrs, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  93. Knights of Columbus

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

  94. Knights of Columbus

    EIN 810805474 · Headquarters: Madison, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  95. Knights of Columbus

    EIN 810847840 · Headquarters: TRUMBULL, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Knights of Columbus

    EIN 812704665 · Headquarters: Torrington, CT, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  97. Knights of Columbus

    EIN 821541393 · Headquarters: Brookfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Knights of Columbus

    EIN 822836743 · Headquarters: Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Knights of Columbus

    EIN 823309402 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  100. Knights of Columbus

    EIN 830881043 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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