Unknown & Unclassified nonprofits in Connecticut

Unknown & Unclassified nonprofits in Connecticut. Browse 7,402 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. Portland Lions Club

    EIN 831770296 · Headquarters: Portland, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  2. Portuguese Club of Hartford Inc

    EIN 060763111 · Headquarters: NEWINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Portuguese Foundation Inc

    EIN 061329611 · Headquarters: WEST HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Portuguese Sport Club Inc

    EIN 066076273 · Headquarters: WATERBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Portuguese Vasco Da Gama Club Inc

    EIN 066068741 · Headquarters: BRIDGEPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  6. Potapaug Audubon Society

    EIN 060989785 · Headquarters: ESSEX, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  7. Potatuck Club Inc

    EIN 060498460 · Headquarters: Newtown, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  8. Practice Foundation Inc

    EIN 237000737 · Headquarters: Mystic, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  9. Prader-willi Syndrome Association Connecticut Chapter Inc

    EIN 222485539 · Headquarters: North Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. Praxair Employees Association of Danbury Inc

    EIN 061388443 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  11. Pre-k for the Little Peanuts Inc

    EIN 453211216 · Headquarters: Bloomfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Precious Cargo Project

    EIN 452593444 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  13. Precision Gymnastics Parent Association Inc

    EIN 920715133 · Headquarters: Danbury, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  14. Pregnancy Support Center Inc

    EIN 061287502 · Headquarters: NEW LONDON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Preston Cemetery Association

    EIN 066043381 · Headquarters: Preston, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Preston Mountain Club Inc

    EIN 131628789 · Headquarters: KENT, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  17. Prime Timers Connecticut

    EIN 473694642 · Headquarters: MANCHESTER, CT, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  18. Prisoner of War-missing in Action Ct Forget-me-nots Inc

    EIN 223052373 · Headquarters: New Milford, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  19. Probus National Inc

    EIN 066056081 · Headquarters: FAIRFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  20. Probus National Inc

    EIN 066087867 · Headquarters: FAIRFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  21. Probus National Inc

    EIN 066087869 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Professional Internal Revenue Retirees Association of Connecticut

    EIN 061051541 · Headquarters: Cheshire, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Professional Women in Construction National Inc

    EIN 934184306 · Headquarters: WESTPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  24. Project Excel Inc

    EIN 061180038 · Headquarters: MERIDEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  25. Project Open Books Inc

    EIN 853819028 · Headquarters: Windsor Locks, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  26. Promisek Incorporated

    EIN 060964701 · Headquarters: BRIDGEWATER, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  27. Promises Kept Equine Rescue

    EIN 460729610 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  28. Promising Scholars Fund Inc

    EIN 800112325 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Proscenium Players Inc

    EIN 770611145 · Headquarters: Groton, CT, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  30. Prospect Beach Fish & Game Club

    EIN 061278244 · Headquarters: WEST HAVEN, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Prospect Car Owners Assoc Inc

    EIN 061302036 · Headquarters: Woodbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Prospect Gun Club

    EIN 061297775 · Headquarters: PROSPECT, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  33. Prospect Historical Society Incorporated

    EIN 237347788 · Headquarters: Prospect, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Prospect Youth Soccer Inc

    EIN 061190966 · Headquarters: PROSPECT, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. Protect Ct Public Lands Coalition

    EIN 830684308 · Headquarters: ROCKFALL, CT, USA · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  36. Protect Lake Waramaug - Coalition to Ban Wake Surfing Association

    EIN 334934396 · Headquarters: new preston, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Providence College Alumni Association New Haven Chapter

    EIN 510191736 · Headquarters: WOODBRIDGE, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Providers Nutrition Network Inc

    EIN 061135488 · Headquarters: NEWINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  39. Psi Chi National Honor Society in Psychology

    EIN 611600549 · Headquarters: Stamford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Psi Chi the International Honor Society in Psychology

    EIN 521538517 · Headquarters: STORRS, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Psi Chi the International Honor Society in Psychology

    EIN 521539093 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Psi Chi the International Honor Society in Psychology

    EIN 582128765 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Psi Chi the National Honor Society in Psychology

    EIN 237031530 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Psi Chi the National Honor Society in Psychology

    EIN 237212234 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Psi Chi the National Honor Society in Psychology

    EIN 237333549 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Psi Chi the National Honor Society in Psychology

    EIN 510218866 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Psi Chi the National Honor Society in Psychology

    EIN 510254917 · Headquarters: HARTFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  48. Psi Chi the National Honor Society in Psychology

    EIN 521538518 · Headquarters: Willimantic, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  49. Psi Chi the National Honor Society in Psychology

    EIN 521575253 · Headquarters: New London, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Psi Chi the National Honor Society in Psychology

    EIN 582039996 · Headquarters: Middletown, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Psi Chi the National Honor Society in Psychology

    EIN 582040002 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Psi Chi the National Honor Society in Psychology

    EIN 582040014 · Headquarters: HAMDEN, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Pt Barnum Foundation Inc

    EIN 222655681 · Headquarters: BRIDGEPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Pta Connecticut Congress

    EIN 060993937 · Headquarters: Seymour, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Pta Connecticut Congress

    EIN 061564980 · Headquarters: NORTH HAVEN, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  56. Pta Connecticut Congress

    EIN 203064366 · Headquarters: TRUMBULL, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Pta Connecticut Congress

    EIN 352371332 · Headquarters: Winsted, CT, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  58. Pta Connecticut Congress

    EIN 372100485 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. Pta Connecticut Congress Fairfield Warde High School Pta

    EIN 061208225 · Headquarters: FAIRFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  60. Pta Connecticut Congress Inc

    EIN 364841562 · Headquarters: WATERFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Pta Connecticut Congress Mckinley School

    EIN 060994085 · Headquarters: FAIRFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  62. Pta Connecticut Congress New Pta Ct

    EIN 060994141 · Headquarters: GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  63. Pta Connecticut Congress Rowayton

    EIN 060994158 · Headquarters: ROWAYTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. Pta Connecticut Congress Sandy Hook Pta

    EIN 066185553 · Headquarters: SANDY HOOK, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  65. PTA Connecticut Congress Scotts Ridge Middle School PTA

    EIN 020611537 · Headquarters: Ridgefield, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  66. Pta Connecticut Congress Tomlinson Ct

    EIN 060994089 · Headquarters: FAIRFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  67. Pta Connecticut Congress-central Pta-ct

    EIN 060994131 · Headquarters: GREENWICH, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  68. Pta Connecticut Inc

    EIN 371839102 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. Pta Connecticut Inc

    EIN 384137930 · Headquarters: Waterbury, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  70. Pta Connecticut Inc Middlebrook Pta

    EIN 060994113 · Headquarters: TRUMBULL, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  71. Pta Ct Congress Cos Cob School

    EIN 510202170 · Headquarters: COS COB, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. Pta Ct Congress Inc Holland Hill School

    EIN 066069317 · Headquarters: FAIRFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  73. PTA CT Congress North Mianus PTA - CT

    EIN 060994143 · Headquarters: Riverside, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. Pta Ct Congress Ridgefield Pta-ct

    EIN 060994126 · Headquarters: RIDGEFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  75. Pta Ct Congress-ridge Road North Haven

    EIN 060994061 · Headquarters: NORTH HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Ptsa Connecticut Congress

    EIN 060993985 · Headquarters: Branford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Ptsa Connecticut Congress

    EIN 061264000 · Headquarters: East Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Ptsa Connecticut Congress

    EIN 066069043 · Headquarters: North Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Ptsa Connecticut Congress

    EIN 066069665 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Ptsa Connecticut Congress

    EIN 066071015 · Headquarters: Milford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Ptsa Connecticut Congress

    EIN 222547359 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. Ptsa Connecticut Congress

    EIN 222563726 · Headquarters: Milford, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Ptsa Connecticut Congress

    EIN 222803495 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  84. Ptsa Connecticut Congress

    EIN 223222470 · Headquarters: Derby, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Ptsa Connecticut Congress

    EIN 237188845 · Headquarters: Newtown, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Ptsa Connecticut Congress

    EIN 263073443 · Headquarters: CHESHIRE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. Ptsa Connecticut Congress

    EIN 264787862 · Headquarters: Newington, CT, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  88. Ptsa Connecticut Congress

    EIN 371611163 · Headquarters: Stratford, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  89. Ptsa Connecticut Congress

    EIN 510507201 · Headquarters: Fairfield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Ptsa Connecticut Congress

    EIN 550878106 · Headquarters: NEW HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Ptsa Connecticut Congress

    EIN 562527190 · Headquarters: Middletown, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Ptsa Connecticut Congress

    EIN 611429442 · Headquarters: Newtown, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. Ptsa Connecticut Congress

    EIN 800253807 · Headquarters: Bristol, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  94. Ptsa Connecticut Congress

    EIN 800265439 · Headquarters: Old Saybrook, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  95. Ptsa Connecticut Congress

    EIN 800419498 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Ptsa Connecticut Congress

    EIN 800757409 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  97. Ptsa Connecticut Congress

    EIN 830369045 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  98. Ptsa Connecticut Congress

    EIN 900437967 · Headquarters: Clinton, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  99. Ptsa Connecticut Congress

    EIN 911798323 · Headquarters: Branford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. Ptsa Connecticut Congress

    EIN 911798364 · Headquarters: Niantic, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

First page and all pages