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. Morris S & Florence H Bender Foundation

    EIN 132951469 · Headquarters: Greenwich, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  2. Mosaic Coalition

    EIN 994444097 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Moses Ginsberg Family Foundation Inc C/o Donald Ginsberg

    EIN 237418806 · Headquarters: NEW MILFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-PF

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

    EIN 223164523 · Headquarters: Ansonia, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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

    EIN 223281649 · Headquarters: NEW LONDON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Mothers Connection of the Farmington Valley Inc

    EIN 223240595 · Headquarters: Simsbury, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  7. Motor Transport Association of Ct Inc

    EIN 060460460 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Mount Carmel Burying Ground Society of Hamden

    EIN 066038925 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Mount Tom Association Inc

    EIN 061232182 · Headquarters: Litchfield, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  10. Mount Tom Land Company

    EIN 061232184 · Headquarters: Litchfield, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  11. Mountain Grove Cemetery Association

    EIN 060460620 · Headquarters: BRIDGEPORT, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  12. Mountain Grove Club Inc

    EIN 060732005 · Headquarters: Southington, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Mountain Laurel Drive Owners Association Inc

    EIN 223189303 · Headquarters: Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Mountain Laurel Skiers Incorporated

    EIN 066070961 · Headquarters: FARMINGTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  15. Mountain of Worship

    EIN 570846002 · Headquarters: Hanover, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  16. Mumford Cove Yacht Club

    EIN 272952544 · Headquarters: Groton, CT, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  17. Municipal Employees Union Independent

    EIN 061058924 · Headquarters: MIDDLETOWN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Museum Small Craft Association Inc

    EIN 222897461 · Headquarters: Stonington, CT, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  19. Music Academy International Inc

    EIN 464377985 · Headquarters: Hartford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Music for the Earth Inc

    EIN 510235307 · Headquarters: LITCHFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  21. Music Mountain Incorporated

    EIN 237219961 · Headquarters: Lakeville, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  22. Music Teachers National Association Inc

    EIN 364680677 · Headquarters: BROOKFIELD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Music Theatre of Ct Inc

    EIN 061213848 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  24. Musical Instrument Technicians Association International

    EIN 431332565 · Headquarters: SOUTHBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  25. Musical Masterworks Inc

    EIN 222340604 · Headquarters: OLD LYME, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Musicians Lifeline Inc

    EIN 273033615 · Headquarters: Simsbury, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  27. Muslims for Humanity

    EIN 853812014 · Headquarters: Brookfield, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  28. Mutual Housing Association of Greater Hartford Inc

    EIN 222925052 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Mutual Security Credit Union Inc

    EIN 060701899 · Headquarters: SHELTON, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. My Catholic Doctor Foundation Inc

    EIN 834663318 · Headquarters: NEW CANAAN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. My Closet

    EIN 472702178 · Headquarters: Hamden, CT, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  32. My Friend Abby Inc

    EIN 842675464 · Headquarters: TRUMBULL, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  33. My Sisters' Place Inc

    EIN 061079879 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. My Support System Corp

    EIN 933160453 · Headquarters: NEW LONDON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Myron L and Claire B Gordon Foundation Inc

    EIN 061267933 · Headquarters: REDDING, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  36. Mystic Chamber of Commerce Inc

    EIN 060861879 · Headquarters: MYSTIC, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. Mystic Flag Committee

    EIN 061096084 · Headquarters: Mystic, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Mystic Garden Club

    EIN 066045735 · Headquarters: WEST MYSTIC, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  39. Mystic Hook & Ladder Co Inc

    EIN 066103289 · Headquarters: MYSTIC, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Mystic Indoor Sports Tennis Club Inc

    EIN 475074331 · Headquarters: Mystic, CT, USA · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  41. Mystic Little League

    EIN 510256254 · Headquarters: Mystic, CT, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  42. Mystic Oral School Advocates

    EIN 863965474 · Headquarters: Mystic, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  43. Mystic Order of Veiled Prophets of Enchanted Realm

    EIN 061012469 · Headquarters: Chehsire, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Mystic Order of Veiled Prophets of Enchanted Realm

    EIN 237535591 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Mystic Order of Veiled Prophets of Enchanted Realm Supreme Council

    EIN 923838641 · Headquarters: Suffield, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Mystic River Chorale

    EIN 061215936 · Headquarters: MYSTIC, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Mystic River Homes Inc

    EIN 060844829 · Headquarters: NORTH HAVEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Mystic Rod & Gun Club Inc

    EIN 222563396 · Headquarters: Mystic, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  49. Mysticalligraphers Inc

    EIN 222586461 · Headquarters: Mystic, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. NAFI Connecticut

    EIN 900059160 · Headquarters: Hartford, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Naiop Ct & Suburban Ny Chapter

    EIN 133525641 · Headquarters: BLOOMFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  52. Nami Greater Bridgeport Ct Inc

    EIN 061608813 · Headquarters: West Hartford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Nami of Connecticut Inc

    EIN 222605701 · Headquarters: HARTFORD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Nami of Connecticut Incorporated

    EIN 061519195 · Headquarters: Woodstock, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Nami of Connecticut Incorporated

    EIN 061523275 · Headquarters: Norwich, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Nami of Connecticut Incorporated

    EIN 300249448 · Headquarters: Avon, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Nami of Connecticut Incorporated

    EIN 825469609 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  58. Nami Shoreline

    EIN 352350755 · Headquarters: Guilford, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. NAMI Waterbury Affiliate of NAMI CT

    EIN 043429847 · Headquarters: Waterbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Nancy & Donald Lattimer Scholarship Fund

    EIN 134022087 · Headquarters: DARIEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  61. Nancy N Mackay Estate - Nn Mackay Fund Tr

    EIN 066277200 · Headquarters: LITCHFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  62. Nathan Hale Pto

    EIN 060947750 · Headquarters: MERIDEN, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  63. National Active and Retired Federal Employees Association

    EIN 066098193 · Headquarters: Wethersfield, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. National Active and Retired Federal Employees Association

    EIN 066098195 · Headquarters: North Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. National Active and Retired Federal Employees Association

    EIN 066098197 · Headquarters: PRESTON, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. National Active and Retired Federal Employees Association

    EIN 521627881 · Headquarters: Windsor, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. National Active and Retired Federal Employees Association

    EIN 581967895 · Headquarters: Newton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. National Air Traffic Controllers Association

    EIN 061249169 · Headquarters: Windsor Locks, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. National Air Traffic Controllers Association

    EIN 061268767 · Headquarters: Windsor Locks, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. National Air Traffic Controllers Association

    EIN 873449930 · Headquarters: Groton, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. National Air Traffic Controllers Association

    EIN 874101881 · Headquarters: Danbury, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. National Alliance of Postal and Federal Employees

    EIN 060947569 · Headquarters: BEACON VILLAGE, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. National Alliance of Postal and Federal Employees

    EIN 237002471 · Headquarters: NEW HAVEN, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. National Alliance of Postal and Federal Employees

    EIN 237149928 · Headquarters: BEACON FALLS, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. National Alliance of Postal and Federal Employees

    EIN 510135888 · Headquarters: STAMFORD, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. National American Glass Club

    EIN 133468671 · Headquarters: Orange, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. National Assoc of Housing & Redevelopment Officials Connecticut

    EIN 521610128 · Headquarters: GLASTONBURY, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. National Assoc of Naval Vets Port 5

    EIN 060641608 · Headquarters: Bridgeport, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. National Association for the Advancement of Colored People

    EIN 061476119 · Headquarters: New Britain, CT, US · Unknown & Unclassified · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  80. National Association for the Advancement of Colored People

    EIN 066099301 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  81. National Association of Benefits and Insurance Professionals - Ma Chapter

    EIN 043220961 · Headquarters: BLOOMFIELD, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  82. National Association of Charitable Gift Planners

    EIN 061326951 · Headquarters: Rocky Hill, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. National Association of Corporate Directors Connecticut Chapter Inc

    EIN 341991353 · Headquarters: Stratford, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  84. National Association of Fsa County Office Employees

    EIN 066068646 · Headquarters: Norwich, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. National Association of Government Employees

    EIN 061119867 · Headquarters: Wethersfield, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  86. National Association of Government Employees

    EIN 061529111 · Headquarters: East Granby, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. National Association of Government Employees

    EIN 222502853 · Headquarters: Unionville, CT, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  88. National Association of Government Employees

    EIN 222563763 · Headquarters: Windsor Locks, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  89. National Association of Government Employees

    EIN 611600231 · Headquarters: CROMWELL, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. National Association of Government Employees

    EIN 651168134 · Headquarters: BRIDGEPORT, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. National Association of Government Employees Nage 222

    EIN 061305909 · Headquarters: Madison, CT, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  92. National Association of Guardsmen Connecticut Chapter

    EIN 222802800 · Headquarters: Farmington, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. National Association of Insurance

    EIN 831897029 · Headquarters: Dayville, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. National Association of Insurance Women

    EIN 061017205 · Headquarters: Dayville, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  95. National Association of Insurance Women

    EIN 066068715 · Headquarters: Prospect, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. National Association of Insurance Women

    EIN 066088825 · Headquarters: CROMWELL, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. National Association of Insurance Women

    EIN 383937525 · Headquarters: DANBURY, CT, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  98. National Association of Letter Carriers

    EIN 066050764 · Headquarters: Meriden, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  99. National Association of Letter Carriers

    EIN 066068649 · Headquarters: NORWALK, CT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  100. National Association of Letter Carriers

    EIN 066099227 · Headquarters: Greenwich, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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