Unknown & Unclassified nonprofits in Maine

Unknown & Unclassified nonprofits in Maine. Browse 4,077 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. Oakes Myrtice Fbo Fir Unitarian Portland Trust Co Llc

    EIN 016017002 · Headquarters: PORTLAND, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  2. Oakland Area Historical Society

    EIN 010340467 · Headquarters: Oakland, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Oakland Masonic Association

    EIN 300598372 · Headquarters: Oakland, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. Ocean Point Colony Trust Inc

    EIN 237185846 · Headquarters: East Boothbay, ME, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  5. Ocean View Cemetery

    EIN 016010461 · Headquarters: Wells, ME, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  6. Oceanside Conservation Trust

    EIN 010376587 · Headquarters: PORTLAND, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Office and Professional Employees International Union

    EIN 016018980 · Headquarters: Madawaska, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Ogunquit Memorial Library

    EIN 010214019 · Headquarters: OGUNQUIT, ME, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  9. Ogunquit Police Association

    EIN 510188941 · Headquarters: Ogunquit, ME, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  10. Oh The Thinks You Can Th INC

    EIN 933886400 · Headquarters: Limington, ME, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  11. Old Orchard Beach Chamber of Commerce

    EIN 010212181 · Headquarters: OLD ORCHARD BEACH, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Old Orchard Beach Vfw Post 7997

    EIN 010344591 · Headquarters: OLD ORCHARD BEACH, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Old Town Residential Services Corp

    EIN 110025004 · Headquarters: OLD TOWN, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Old Town VOA Affordable Housing Inc

    EIN 465221620 · Headquarters: Brunswick, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Old Town-orono Ymca Foundation

    EIN 223160786 · Headquarters: OLD TOWN, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Old York Historical Society

    EIN 222474846 · Headquarters: YORK, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Oliver Ministries and Counseling and Counseling Association Inc

    EIN 208179247 · Headquarters: Old Town, ME, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  18. OneMaine

    EIN 451737442 · Headquarters: Portland, ME, USA · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-EZ

  19. Onion Foundation

    EIN 471289795 · Headquarters: Auburn, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  20. Open Gates Horse Club

    EIN 271670936 · Headquarters: Bradford, ME, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  21. Opportunity Maine

    EIN 113793495 · Headquarters: Portland, ME, USA · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-EZ

  22. Optimist International

    EIN 874599895 · Headquarters: Gray, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  23. Optimist International

    EIN 900088078 · Headquarters: Minot, ME, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  24. Oquossoc Atv Club

    EIN 461188003 · Headquarters: Oquossoc, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Orchard Grove Cemetery Association

    EIN 010132610 · Headquarters: KITTERY, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Order of Eastern Star of Main

    EIN 237336466 · Headquarters: PALERMO, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Order of Eastern Star of Maine

    EIN 010431670 · Headquarters: Wiscasset, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Order of Eastern Star of Maine

    EIN 016014988 · Headquarters: Kennebunk, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Order of Eastern Star of Maine

    EIN 237164898 · Headquarters: Limington, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Order of Eastern Star of Maine

    EIN 237336445 · Headquarters: Fryeburg, ME, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  31. Order of Eastern Star of Maine

    EIN 237336455 · Headquarters: Saco, ME, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  32. Order of Eastern Star of Maine

    EIN 237336462 · Headquarters: Bridgton, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Order of Eastern Star of Maine

    EIN 237540293 · Headquarters: Augusta, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  34. Order of Eastern Star of Maine

    EIN 237540294 · Headquarters: Edgecomb, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Order of Eastern Star of Maine

    EIN 237540297 · Headquarters: Springvale, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Order of Eastern Star of Maine

    EIN 237540299 · Headquarters: WARREN, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Order of Eastern Star of Maine

    EIN 237540302 · Headquarters: Westbrook, ME, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  38. Order of Eastern Star of Maine

    EIN 237540306 · Headquarters: Tenants Harbor, ME, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  39. Order of Eastern Star of Maine

    EIN 237540317 · Headquarters: PITTSFIELD, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Order of Eastern Star of Maine

    EIN 237540320 · Headquarters: Milo, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Order of Eastern Star of Maine

    EIN 237540324 · Headquarters: Calais, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. Order of Eastern Star of Maine

    EIN 237540336 · Headquarters: Bowdoin, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  43. Order of Eastern Star of Maine

    EIN 237540349 · Headquarters: Newcastle, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Order of Eastern Star of Maine

    EIN 237540363 · Headquarters: West Paris, ME, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  45. Order of Eastern Star of Maine

    EIN 237540365 · Headquarters: Sabattus, ME, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  46. Order of Eastern Star of Maine

    EIN 237540367 · Headquarters: Thomaston, ME, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  47. Order of Eastern Star of Maine

    EIN 237540370 · Headquarters: Ellsworth, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Order of Eastern Star of Maine

    EIN 237540393 · Headquarters: Bucksport, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Order of Eastern Star of Maine

    EIN 237540403 · Headquarters: Deer Isle, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Order of Eastern Star of Maine

    EIN 237540415 · Headquarters: Brewer, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Order of the Amaranth Inc Supreme Council

    EIN 237614119 · Headquarters: WOOLWICH, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Order of the Eastern Star of Maine

    EIN 237141652 · Headquarters: Newport, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Order of the Eastern Star of Maine

    EIN 237336463 · Headquarters: Windham, ME, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  54. Order of the Eastern Star of Maine

    EIN 237336464 · Headquarters: Bucksport, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  55. Order of the Eastern Star of Maine

    EIN 237540286 · Headquarters: AUGUSTA, ME, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  56. Order of the Eastern Star of Maine

    EIN 237540298 · Headquarters: Clinton, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Order of the Eastern Star of Maine

    EIN 237540354 · Headquarters: Solon, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Order of the Eastern Star of Maine

    EIN 237540356 · Headquarters: Stratton, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. Order of the Eastern Star of Maine

    EIN 237540369 · Headquarters: Sherman, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Order of the Eastern Star of Maine

    EIN 237540372 · Headquarters: Stockholm, ME, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  61. Order of the Eastern Star of Maine

    EIN 237540378 · Headquarters: Harrison, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Orient Food Pantry

    EIN 473699083 · Headquarters: Orient, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Orland Historical Society Inc

    EIN 237383728 · Headquarters: Orland, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Orono Firefighters Association

    EIN 010428520 · Headquarters: ORONO, ME, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  65. Orono Health Association

    EIN 010288129 · Headquarters: ORONO, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Orono Historical Society

    EIN 222487983 · Headquarters: Orono, ME, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  67. Orono Land Trust

    EIN 010417249 · Headquarters: ORONO, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Orphans Ransom

    EIN 272860898 · Headquarters: Orrington, ME, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  69. Orrington Teachers Association

    EIN 010511601 · Headquarters: Orrington, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  70. Orrs Bailey Yacht Club

    EIN 016015613 · Headquarters: Orrs Island, ME, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  71. Orrs Island Library Inc

    EIN 016017260 · Headquarters: ORRS ISLAND, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. Ossipee Lake Association

    EIN 262874130 · Headquarters: East Waterboro, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Ossipee Mountaineers Snowmobile Club

    EIN 453658910 · Headquarters: East Waterboro, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Otisfield Historical Society

    EIN 010376940 · Headquarters: Otisfield, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Otto & Fran Walter Foundation Inc

    EIN 131625529 · Headquarters: BOOTHBAY HARBOR, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  76. Our Future

    EIN 813590869 · Headquarters: Sanford, ME, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  77. Owen Ministries Inc

    EIN 882597904 · Headquarters: Hermon, ME, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  78. Owls Head Village Library Association

    EIN 016020157 · Headquarters: Owls Head, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Owls Head Volunteer Fire Co Inc

    EIN 016023628 · Headquarters: Owls Head, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Oxford Council Number 14 R &Sm

    EIN 800595367 · Headquarters: Peru, ME, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  81. Oxford County Agricultural Society

    EIN 010133442 · Headquarters: NORWAY, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. Oxford County Council American Legion Auxiliary

    EIN 300830075 · Headquarters: Mason Twp, ME, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  83. Oxford County Mineral and Gem

    EIN 010345888 · Headquarters: NORWAY, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. Oxford County Shrine Club

    EIN 237362227 · Headquarters: LEWISTON, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. Oxford County Town Clerks Association

    EIN 474406631 · Headquarters: South Paris, ME, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  86. Oxford Hills Chamber of Commerce

    EIN 237099620 · Headquarters: SOUTH PARIS, ME, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  87. Oxford Hills Educational Support Staff

    EIN 364677670 · Headquarters: South Paris, ME, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  88. Oxford Hills Teachers Association

    EIN 222474889 · Headquarters: Otisfield, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Oxford Historical Society

    EIN 010376425 · Headquarters: Oxford, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Oxford War Memorial

    EIN 262203369 · Headquarters: OXFORD, ME, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  91. Oyster River Bog Association

    EIN 222704107 · Headquarters: West Rockport, ME, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  92. Palermo School Club

    EIN 010394229 · Headquarters: Palermo, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Palermo Youth Activities

    EIN 992934007 · Headquarters: PALERMO, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Palestine Tabernacle Xli Holy Royal Arch Knight Templar Priests

    EIN 020355819 · Headquarters: Palmyra, ME, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  95. Parents of Murdered Children

    EIN 311331962 · Headquarters: Winslow, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Parian Lodge Building Corporation

    EIN 510481185 · Headquarters: CORINNA, ME, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Paris Cape Historical Society

    EIN 010379081 · Headquarters: Mechanic Falls, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. Paris Hill Library Association

    EIN 237411542 · Headquarters: South Paris, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. Paris Public Library Association

    EIN 010281558 · Headquarters: South Paris, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Parkinsons Cure Research Foundation

    EIN 814702156 · Headquarters: Cape Elizabeth, ME, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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