Nonprofits in District of Columbia

Nonprofits in District of Columbia. Browse 18,651 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. Social Innovation and Impact Institute Si3

    EIN 862596359 · Headquarters: Washington, DC, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Social Justice Public Charter School Inc

    EIN 825082397 · Headquarters: WASHINGTON, DC, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Social Marketing Institute

    EIN 522274841 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  4. Social Progress Corporation

    EIN 471147069 · Headquarters: Washington, DC, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  5. Social Progress Imperative Inc

    EIN 364701434 · Headquarters: Washington, DC, USA · Social Science · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Social Sciences Institute

    EIN 260240955 · Headquarters: Washington, DC, US · Social Science · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  7. Social Security Works

    EIN 461373125 · Headquarters: WASHINGTON, DC, USA · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Social Security Works Education Fund

    EIN 461500551 · Headquarters: WASHINGTON, DC, USA · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Social Sports Foundation

    EIN 472618971 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Social Technologies Institute

    EIN 542051815 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  11. Social Thread Project

    EIN 263683818 · Headquarters: Washington, DC, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2011 · Primary form: IRS Form 990-EZ

  12. Social Work Democracy Project Inc

    EIN 863502210 · Headquarters: WASHINGTON, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Society for American Archaeology

    EIN 526046203 · Headquarters: Washington, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990

  14. Society for Biodiversity Preservation

    EIN 822245785 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  15. Society for Cardiovascular Angiography & Interventions

    EIN 450699908 · Headquarters: WASHINGTON, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Society for Cardiovascular Angiography and Interventions Foundation

    EIN 341266824 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Society for Children Orphaned by AIDS Inc

    EIN 900150914 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Society for Community Research and Action Nfp

    EIN 521520869 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990

  19. Society for Conservation Biology

    EIN 330147824 · Headquarters: WASHINGTON, DC, USA · Environment · Latest available filing year: 2025 · Primary form: IRS Form 990

  20. Society for Environmental Graphic Design Education Foundation

    EIN 042940862 · Headquarters: WASHINGTON, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2015 · Primary form: IRS Form 990-EZ

  21. Society for Experimental Biology and Medicine

    EIN 131635283 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Society for Glycobiology (Formerly the Society for Complex Carbohydrates)

    EIN 521295523 · Headquarters: WASHINGTON, DC, USA · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. Society for History in the Federal Government

    EIN 521190235 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Society for International Development Sid

    EIN 530260526 · Headquarters: Washington, DC, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Society for International Development, United States Chapter

    EIN 521174165 · Headquarters: Washington, DC, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Society for Maintenance and Reliability Professionals

    EIN 263151121 · Headquarters: WASHINGTON, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Society for Maintenance and Reliability Professionals Foundation

    EIN 311359197 · Headquarters: WASHINGTON, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  28. Society for Maternal-fetal Medicine

    EIN 742052541 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Society for Neuroscience

    EIN 461667026 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  30. Society for Neuroscience

    EIN 520895843 · Headquarters: WASHINGTON, DC, USA · Medical Research · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Society for Occupational Environmental Health

    EIN 521006480 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  32. Society for Personality and Social Psychology Inc

    EIN 591667323 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Society for Radiation Oncology Administrators

    EIN 232354134 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Society for Research in Child Development Inc

    EIN 356005842 · Headquarters: Washington, DC, USA · Social Science · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. Society for Science & the Public

    EIN 530196483 · Headquarters: WASHINGTON, DC, USA · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. Society for Technical Communication

    EIN 237264292 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  37. Society for the Advancement of Algebraic Modeling

    EIN 261550629 · Headquarters: Washington, DC, US · Science & Technology · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  38. Society for the Advancement of the Art Museum of the Americas

    EIN 873232310 · Headquarters: WASHINGTON, DC, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Society for the Arts in Healthcare Inc

    EIN 020479949 · Headquarters: Washington, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2011 · Primary form: IRS Form 990

  40. Society for the Preservation of Ancient Churches Inc

    EIN 522256840 · Headquarters: Washington, DC, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Society for the Preservation Spgh

    EIN 521058376 · Headquarters: Washington, DC, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Society for the Psychological Study of Social Issues

    EIN 381614481 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Society for the Rule of Law

    EIN 934685009 · Headquarters: WASHINGTON, DC, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. Society for Women's Health Research

    EIN 521694732 · Headquarters: WASHINGTON, DC, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. Society of American Foresters

    EIN 530204630 · Headquarters: WASHINGTON, DC, USA · Employment · Latest available filing year: 2024 · Primary form: IRS Form 990

  46. Society of American Friends of the Jewish Community Vienna

    EIN 260388495 · Headquarters: WASHINGTON, DC, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  47. Society of American Homeowners

    EIN 392820238 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Society of American Military Engineers

    EIN 521095482 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Society of American Travel Writers

    EIN 526055577 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Society of Black Archaeologists

    EIN 831662591 · Headquarters: WASHINGTON, DC, USA · Social Science · Latest available filing year: 2025 · Primary form: IRS Form 990

  51. Society of Broadcasting Engineers Chapter 37

    EIN 521652979 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Society of Colonial Wars in the District of Columbia

    EIN 526078080 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Society of Dermatology Physician Associates (SDPA)

    EIN 800103386 · Headquarters: Washington, DC, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Society of Disabled Journalists

    EIN 993934241 · Headquarters: Washington, DC, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Society of East African Nurse Anest Hesiologists in America

    EIN 332466698 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Society of Environmental Journalists Inc

    EIN 520194031 · Headquarters: WASHINGTON, DC, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. Society of Environmental Toxicology and Chemistry

    EIN 521184315 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. Society of Environmental Toxicology and Chemistry of North America

    EIN 371482800 · Headquarters: Washington, DC, USA · Science & Technology · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Society of Ethiopians Established in Diaspora

    EIN 571146413 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Society of Forensic Anthropologists Incorporated

    EIN 352379532 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Society of Government Economists

    EIN 237302199 · Headquarters: Washington, DC, US · Public & Societal Benefit · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  62. Society of Health and Physical Educators

    EIN 822307037 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  63. Society of Health Policy Young Professionals

    EIN 260662350 · Headquarters: WASHINGTON, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Society of Hispanic Professional Engineers Washington Dc Chapter

    EIN 822055576 · Headquarters: Washington DC, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Society of Industrial and Office Realtors

    EIN 530184820 · Headquarters: WASHINGTON, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. Society of Interventional Oncology Inc

    EIN 412161648 · Headquarters: WASHINGTON, DC, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Society of Mayflower Descendants in the District of Columbia

    EIN 526047033 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Society of National Association Publications

    EIN 237194058 · Headquarters: WASHINGTON, DC, USA · Community Improvement & Capacity Building · Latest available filing year: 2017 · Primary form: IRS Form 990

  69. Society of Pediatric Nurses

    EIN 521904907 · Headquarters: Washington, DC, US · Health Care · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  70. Society of Pi Kappa Lambda

    EIN 237055254 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  71. Society of Primary Care Policy Fellows

    EIN 541810360 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  72. Society of Professional Engineers District of Columbia

    EIN 526046209 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Society of Saint Vincent De Paul

    EIN 800807050 · Headquarters: WASHINGTON, DC, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Society of Satellite Professionals Mid Atlantic Regional Chapter

    EIN 541394057 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  75. Society of St Vincent De Paul Church of the Incarnation Conferen

    EIN 832785686 · Headquarters: WASHINGTON, DC, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. Society of St Vincent De Paul Holy Name Church

    EIN 452563902 · Headquarters: Washington, DC, US · Religion Related · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  77. Society of St Vincent De Paul in the Archdiocese of Washington

    EIN 450572692 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  78. Society of St Vincent De Paul Our Lady Queen of Peace Conference

    EIN 832588457 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Society of St Vincent De Paul St Benedict the Moor Conference

    EIN 832509172 · Headquarters: WASHINGTON, DC, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Society of the Descendants of the Signers of the Constitution

    EIN 993885949 · Headquarters: Washington, DC, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Society of the Friendly Sons of St Patrick

    EIN 521199237 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. Society of the War of 1812 in the District of Columbia

    EIN 526055588 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Society of Wine Educators Inc

    EIN 222238037 · Headquarters: WASHINGTON, DC, USA · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Socks for Susie

    EIN 851825186 · Headquarters: Washington, DC, US · Human Services · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  85. Sodev International

    EIN 522260489 · Headquarters: Washington, DC, USA · International, Foreign Affairs & National Security · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  86. Sof Action Inc

    EIN 331955260 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Sof Support Inc

    EIN 821876288 · Headquarters: WASHINGTON, DC, USA · Human Services · Latest available filing year: 2022 · Primary form: IRS Form 990

  88. Soft-coated Wheaten Terrier Genetic Research Foundation

    EIN 271808948 · Headquarters: Washington, DC, US · Animal Related · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  89. Software Education Foundation

    EIN 814001808 · Headquarters: WASHINGTON, DC, USA · Science & Technology · Latest available filing year: 2023 · Primary form: IRS Form 990

  90. Software Publishers Association

    EIN 521329859 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Sojourner Truth School

    EIN 832203475 · Headquarters: WASHINGTON, DC, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. Sojourners Inc

    EIN 237380554 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Solar & Storage Industries Institute

    EIN 881327537 · Headquarters: WASHINGTON, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Solar Business Institute

    EIN 474703858 · Headquarters: WASHINGTON, DC, USA · Environment · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  95. Solar Electric Light Fund

    EIN 521701564 · Headquarters: Washington, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. Solar Energy Industries Association

    EIN 521072179 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. Solar Energy Manufacturers for America Coalition

    EIN 921011338 · Headquarters: WASHINGTON, DC, USA · Environment · Latest available filing year: 2023 · Primary form: IRS Form 990

  98. Solar Energy Manufacturers for America Education Fund

    EIN 333551630 · Headquarters: Washington, DC, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Solar Household Energy Inc

    EIN 311645471 · Headquarters: Washington, DC, US · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. Solar United Neighbors Action

    EIN 862788934 · Headquarters: Washington, DC, USA · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990

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