Unknown & Unclassified nonprofits in District of Columbia

Unknown & Unclassified nonprofits in District of Columbia. Browse 4,522 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. Anthony and Anna L Carozza Foundation

    EIN 520794431 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  2. Anthony J Hyde Parent Teacher Association

    EIN 521844971 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Antibacterial Working Group Inc D/b/a Antimicrobials Working Group

    EIN 461773732 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  4. Apartment & Office Building Assoc of Metropolitan Washington

    EIN 530184431 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Aphis Employee Relief Fund

    EIN 320303150 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  6. Apple Processors Association

    EIN 521527990 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  7. Apprenticeships for America

    EIN 872326163 · Headquarters: Washington, DC, United States · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  8. APT International Inc

    EIN 521514895 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Apw-aba

    EIN 020181885 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  10. Apwu Texas Holding Corp

    EIN 510624578 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990

  11. Arab American Institute

    EIN 521395040 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Arc of Arizona Inc

    EIN 860191375 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Arcana Foundation Inc

    EIN 521515952 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  14. Arch Development Corporation

    EIN 521729252 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  15. Archbishop Carroll High School

    EIN 530207416 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Argument Magazine Foundation

    EIN 394805662 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Arizonans for a Responsible Future

    EIN 991656670 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  18. Armed Forces Retirement Home American Legion Post 70

    EIN 260093261 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  19. Army and Navy Club

    EIN 530028710 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Arnold Air Society-silver Wings

    EIN 526056404 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Art Deco Society of Washington Inc

    EIN 521309466 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Arthur C Clarke Foundation of the United States

    EIN 521341027 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Artist Rights Alliance

    EIN 833153501 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  24. Artstudy Dc

    EIN 274528371 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  25. Aseptic and Antimicrobial Processing & Packaging Consortium

    EIN 474583780 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  26. Asian Americans Rise

    EIN 993429268 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Asian Pacific American Bar Association of Dc Inc

    EIN 521236504 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Asian Pacific American Labor Alliance Afl -Cio

    EIN 521777961 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Asian Pacific American Labor Alliance Afl-cio

    EIN 271396630 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. Asian Technology Information Program

    EIN 850434821 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Asnadu Inc

    EIN 852371114 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  32. Aspa Endowment

    EIN 521484469 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Aspira Association Inc

    EIN 132627568 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  34. Assoc for the Study of African American Life & His

    EIN 530219640 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. Assoc of Literary Scholars Critics and Writers Inc

    EIN 770402721 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  36. Associated Actors and Artistes of Americ

    EIN 130452378 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  37. Associated Air Balance Council

    EIN 922593223 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  38. Associated Builders and Contractors

    EIN 520579380 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. Associates for Renewal in Education

    EIN 520914949 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  40. Associates of the National Council of Catholic Women Inc

    EIN 237135841 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  41. Association for Advancing Tissue and Biologics

    EIN 394309574 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Association for Behavioral Health and Wellness Inc

    EIN 521851690 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Association for Dressings & Sauces

    EIN 510245131 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. Association for Prevention Teaching and Research Inc

    EIN 521314223 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. Association for Professionalism in Foreign Aid

    EIN 392983150 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Association for Professionals in Infection Ctrl & Epidemiology Inc

    EIN 042664027 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  47. Association for Psychological Science

    EIN 731345573 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. Association for the Preservation of Historic Congressional Cemetery

    EIN 521071828 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Association for the Sciences of Limnology & Oceanography Inc

    EIN 381710020 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Association for Truth and Fairness C/o Lawrence Lamade

    EIN 204722059 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  51. Association for Women in Science Inc

    EIN 223387481 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Association for Women in Science Inc

    EIN 237221574 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Association for Women in Science Inc

    EIN 272015091 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  54. Association for Women in Science Inc

    EIN 521746263 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  55. Association for Women in Science Inc

    EIN 521839012 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  56. Association for Women in Science Inc

    EIN 811936666 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  57. Association for Women in Science Inc

    EIN 823656367 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  58. Association of American Law Schools Inc

    EIN 941450490 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Association of American Publishers Inc

    EIN 132660200 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Association of American Railroads

    EIN 536000125 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  61. Association of American Red Cross Retirees

    EIN 591748379 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Association of Bituminous Contractors Inc

    EIN 237118181 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. Association of Catholic Colleges and Universities

    EIN 522268177 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. Association of Chartered Certified Accountants Us Center

    EIN 954172967 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. Association of College and University Auditors

    EIN 237204109 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  66. Association of Community College Trustees

    EIN 526120210 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Association of Corporate Counsel

    EIN 521267965 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Association of Corporate Counsel Group Return

    EIN 521997796 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  69. Association of Edison Illuminating Companies Inc

    EIN 130453115 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. Association of Equipment Management Professionals

    EIN 640665249 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. Association of Farmworker Opportunity Programs

    EIN 561009730 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. Association of Federal Communications Consulting Engineers Scholarship Fund

    EIN 521374920 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  73. Association of Fish & Wildlife Agencies

    EIN 416029770 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. Association of French War Veterans of Washington Incorporated

    EIN 521645887 · Headquarters: washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Association of Home Appliance Manufacturers Inc

    EIN 362615812 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. Association of Independent Schools of Greater Wash

    EIN 521241780 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Association of International Education Administrat

    EIN 431427422 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Association of Jesuit Colleges and Universities

    EIN 520902755 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. Association of Judicial Administrative Assistants

    EIN 710936898 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  80. Association of Maternal and Child Health Programs

    EIN 521529448 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Association of Metropolitan Water Agencies

    EIN 521263300 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  82. Association of Moldovans in USA - Casa Mare

    EIN 272063085 · Headquarters: Washington DC, DC, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  83. Association of Notre Dame Clubs Inc - Washington Dc

    EIN 311075467 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  84. Association of Plastic Recyclers Inc

    EIN 521779031 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. Association of Practicing Psychologists Montgomery Prince Ge

    EIN 521051712 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Association of Professional Communication Consultants Inc

    EIN 731206825 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Association of Research Libraries

    EIN 520784198 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Association of Retirees of the Inter- American Development Bank

    EIN 521656218 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  89. Association of Securities Exchange Commission Alum

    EIN 223036796 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  90. Association of State & Territorial Solid Waste Management Officials Inc

    EIN 237446280 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Association of Test Publishers

    EIN 363918100 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  92. Association of the Oldest Inhabitants of the District of Col

    EIN 526047134 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Association of University Programs in Health Administration

    EIN 366110249 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Association of University Technology Managers Inc

    EIN 363011951 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Association of Veterinary Biologics Companies

    EIN 481178853 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  96. Association of Washington Council Organizations

    EIN 933086008 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  97. At The Well

    EIN 832697895 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. At-large Chapter of the American Association of University Professors

    EIN 331600543 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Ata Litigation Center

    EIN 541332836 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Athlete Unbothered

    EIN 301312959 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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