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. NASP Group

    EIN 900779594 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  2. Natca

    EIN 521522639 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. National Academy of Social Insurance

    EIN 521451753 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. National Active and Retired Federal Employees Association

    EIN 521209597 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. National Active and Retired Federal Employees Association

    EIN 521294376 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. National Active and Retired Federal Employees Association

    EIN 521617924 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. National Active and Retired Federal Employees Association

    EIN 521619803 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. National Active and Retired Federal Employees Association

    EIN 530237575 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. National African-american Insurance Association

    EIN 311471178 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. National Air Traffic Contollers Association

    EIN 204380339 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. National Air Traffic Controllers Association

    EIN 043472955 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  12. National Air Traffic Controllers Association

    EIN 522316290 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. National Air Traffic Controllers Association

    EIN 562556176 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. National Air Traffic Controllers Association

    EIN 621358774 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. National Air Traffic Controllers Association

    EIN 820809254 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. National Air Traffic Controllers Association

    EIN 831247488 · Headquarters: Washington DC, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. National Air Traffic Controllers Association

    EIN 843895616 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. National Air Transportation Association Inc

    EIN 530238820 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  19. National Air Transportation Foundation

    EIN 521295455 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. National Alliance for Taxicab Justice

    EIN 113699506 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  21. National Alliance of Healthcare Purchaser Coalitions Inc

    EIN 650328971 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. National Alliance of Postal and Federal Employees

    EIN 112392621 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. National Alliance of Postal and Federal Employees

    EIN 222230231 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. National Alliance of Postal and Federal Employees

    EIN 237005328 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. National Alliance of Postal and Federal Employees

    EIN 237005391 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. National Alliance of Postal and Federal Employees

    EIN 237006916 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. National Alliance of Postal and Federal Employees

    EIN 237006917 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. National Alliance of Postal and Federal Employees

    EIN 237007348 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. National Alliance of Postal and Federal Employees

    EIN 237007581 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. National Alliance of Postal and Federal Employees

    EIN 237007582 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. National Alliance of Postal and Federal Employees

    EIN 237007584 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. National Alliance of Postal and Federal Employees

    EIN 237007585 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. National Alliance of Postal and Federal Employees

    EIN 237007586 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. National Alliance of Postal and Federal Employees

    EIN 237007806 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. National Alliance of Postal and Federal Employees

    EIN 237008070 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. National Alliance of Postal and Federal Employees

    EIN 237008414 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. National Alliance of Postal and Federal Employees

    EIN 237389158 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. National Alliance of Postal and Federal Employees

    EIN 581514908 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. National Alliance of Postal and Federal Employees

    EIN 741505991 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. National Alliance of Postal and Federal Employees

    EIN 953244207 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. National Alliance of Sickle Cell Centers

    EIN 854331176 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. National Alliance to End Homelessness

    EIN 521299641 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. National Allinace of Postal and Federal Employees

    EIN 262835264 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. National American Indian Housing Council

    EIN 222096315 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. National Anti-racism in Medicine Curriculum Coalition

    EIN 332547120 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. National Asian Pacific American Bar Association

    EIN 770233358 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. National Assc of State Directors of Teacher Education and Certification

    EIN 942967408 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. National Assoc for Biomedical Research

    EIN 042688181 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. National Assoc of Enrolled Agents Educ Foundation

    EIN 521535819 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. National Association for Behavioral Heal Thcare Education and Research Foundation

    EIN 521152272 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  51. National Association for Behavioral Healthcare

    EIN 221661978 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  52. National Association for Bilingual Education

    EIN 746265861 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. National Association for Business Economics

    EIN 136133105 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. National Association for Gifted Children

    EIN 310686464 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. National Association for Law Placement Inc

    EIN 237329291 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. National Association for Rural Mental Health Inc

    EIN 391461320 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  57. National Association for State Community Services Programs

    EIN 570715943 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. National Association for Surface Finishing Inc

    EIN 352013643 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. National Association for the Advancement of Orthotics & Prosthetics

    EIN 581854805 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  60. National Association for the Support of Long Term Care

    EIN 521593085 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  61. National Association Medical Staff Services

    EIN 953285536 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. National Association of Affordable Housing Lenders

    EIN 521677752 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. National Association of Benefits and Insurance Professionals

    EIN 362144394 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. National Association of Beverage Importers Inc

    EIN 530114590 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. National Association of Bond Lawyers

    EIN 363016503 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. National Association of Broadcasters

    EIN 530114600 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. National Association of Business Political Action Committees

    EIN 731072564 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. National Association of Children's Hospitals Inc

    EIN 582176067 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. National Association of Clean Water Agencies

    EIN 237088488 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. National Association of College and University Attorneys

    EIN 521209127 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. National Association of College and University Business Officers

    EIN 530259954 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. National Association of Concerned Veterans

    EIN 237314478 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. National Association of Consumer Advocates Inc

    EIN 043239354 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. National Association of Consumer Bankruptcy Attorneys Inc

    EIN 521793623 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. National Association of Counties

    EIN 530190321 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. National Association of Counties Research Foundation

    EIN 530241255 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. National Association of County Engineers

    EIN 591002720 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. National Association of County Veterans Service Officers Inc

    EIN 382942975 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. National Association of Criminal Defense Lawyers Inc

    EIN 741916260 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  80. National Association of Dealer Counsel

    EIN 753167591 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. National Association of Development Organizations

    EIN 411261188 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. National Association of Ems Physicians

    EIN 570820621 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  83. National Association of Energy Service Companies

    EIN 521318222 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  84. National Association of Enrolled Agents

    EIN 237183380 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  85. National Association of Epilepsy Centers

    EIN 411596217 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. National Association of Federal Veterinarians

    EIN 540675291 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. National Association of Federally Impacted Schools Inc

    EIN 237257037 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. National Association of Foreign - Trade Zones

    EIN 237417702 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. National Association of Government Archives and Records Administratio

    EIN 141665466 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  90. National Association of Government Employees R3-05

    EIN 861836219 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  91. National Association of Healthcare Access Management

    EIN 341272668 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. National Association of Hispanic Journalists

    EIN 463985228 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  93. National Association of Home Builders (NAHB)

    EIN 880359303 · Headquarters: Washington, DC, United States · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. National Association of Housing and Redevelopment Officials

    EIN 362167803 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  95. National Association of Independent Colleges and Universities

    EIN 521125164 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. National Association of Independent Life Brokerage Agencies

    EIN 363209661 · Headquarters: WASHINGTON, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. National Association of Independent Schools Inc

    EIN 042104741 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. National Association of Investment Companies Inc

    EIN 222072345 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. National Association of Letter Carriers Branch 142

    EIN 520908160 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. National Association of Letter Carriers Building Corporation

    EIN 521400687 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

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