Nonprofits in Maryland

Nonprofits in Maryland. Browse 47,413 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. Olivias House Inc

    EIN 821571043 · Headquarters: WHITE PLAINS, MD, US · Human Services · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  2. Olney Boys and Girls Community Sports Association Inc

    EIN 237008610 · Headquarters: OLNEY, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. Olney Chamber of Commerce Inc

    EIN 521390825 · Headquarters: OLNEY, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  4. Olney Childrens Ballet Theater Incorporated

    EIN 521870384 · Headquarters: Gaithersburg, MD, USA · Arts, Culture & Humanities · Latest available filing year: 2022 · Primary form: IRS Form 990

  5. Olney Civic Fund Inc

    EIN 462953755 · Headquarters: Olney, MD, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  6. Olney Community Band Inc

    EIN 311567586 · Headquarters: Olney, MD, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Olney Community Baseball Team Inc

    EIN 872392625 · Headquarters: OLNEY, MD, USA · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Olney Cross Country Club

    EIN 862942859 · Headquarters: ROCKVILLE, MD, USA · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  9. Olney Elementary School PTA

    EIN 521467131 · Headquarters: Olney, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  10. Olney Help Inc

    EIN 521050979 · Headquarters: OLNEY, MD, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. Olney Home for Life

    EIN 800765594 · Headquarters: OLNEY, MD, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  12. Olney Jazz Troupe Inc

    EIN 571231053 · Headquarters: Silver Spring, MD, US · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Olney Kehila

    EIN 202645280 · Headquarters: Olney, MD, US · Education · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  14. Olney Kiwanis Foundation Inc

    EIN 364697036 · Headquarters: Olney, MD, US · Community Improvement & Capacity Building · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  15. Olney Mill Community Association Inc

    EIN 520904353 · Headquarters: OLNEY, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  16. Olney Mill Swim Club Inc

    EIN 237155798 · Headquarters: Olney, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. Olney Rotary Charitable Trust Inc

    EIN 260256144 · Headquarters: Olney, MD, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  18. Olney Theatre Center for the Arts Inc

    EIN 536010333 · Headquarters: OLNEY, MD, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. Olney Theatre Corporation Inc

    EIN 521149571 · Headquarters: OLNEY, MD, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Olokoro Development Union Metro Area Chapter

    EIN 522154272 · Headquarters: Lanham, MD, USA · International, Foreign Affairs & National Security · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  21. Olorunkemi Popoola Foundation Inc

    EIN 871771443 · Headquarters: LANDOVER, MD, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  22. Olp Cobras Football

    EIN 831364327 · Headquarters: baltimore, MD, US · Recreation & Sports · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  23. Olubusayo&olayinka Awe Foundation Incorporated

    EIN 882048021 · Headquarters: GERMANTOWN, MD, USA · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  24. Olumen Hemsow Endowment Inc

    EIN 932667744 · Headquarters: Baltimore, MD, USA · Religion Related · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  25. Olympian Brothehood of America Olympos

    EIN 521313961 · Headquarters: Baltimore, MD, US · Mutual & Membership Benefit · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  26. Om Connected Incorporated

    EIN 880966333 · Headquarters: BALTIMORE, MD, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  27. Om Tapovan USA Inc

    EIN 816592625 · Headquarters: ABINGDON, MD, US · Recreation & Sports · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  28. Omaha Beach Chapter No 7 Dav Inc Disabled American Veterans

    EIN 521325570 · Headquarters: BOWIE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. Omega Baltimore Foundation Inc

    EIN 451609977 · Headquarters: Baltimore, MD, USA · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990

  30. Omega Care Foundation Inc

    EIN 331413857 · Headquarters: BELTSVILLE, MD, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  31. Omega Chi Epsilon Chemical Engineering Honor Society

    EIN 742037806 · Headquarters: College Park, MD, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  32. Omega Fire Ministries International Baltimore Inc

    EIN 821643633 · Headquarters: Curtis Bay, MD, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Omega Fire Ministries Maryland

    EIN 821062543 · Headquarters: Upper Marlboro, MD, USA · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Omega Gold Development Group Inc

    EIN 861100248 · Headquarters: Suitland, MD, USA · Housing & Shelter · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  35. Omega Gospel Missions

    EIN 711037344 · Headquarters: Bowie, MD, USA · Religion Related · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  36. Omega Psi

    EIN 474546780 · Headquarters: Baltimore, MD, US · Education · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  37. Omega Psi Phi Franternity

    EIN 854219581 · Headquarters: APG, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Omega Psi Phi Fraternity

    EIN 161707013 · Headquarters: WALDORF, MD, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-EZ

  39. Omega Psi Phi Fraternity

    EIN 237065905 · Headquarters: Bowie, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  40. Omega Psi Phi Fraternity

    EIN 521775542 · Headquarters: Princess Anne, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  41. Omega Psi Phi Fraternity

    EIN 526071185 · Headquarters: Annapolis, MD, US · Recreation & Sports · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  42. Omega Psi Phi Fraternity 842 Lambda Gamma Gamma District 2

    EIN 521754383 · Headquarters: Clinton, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  43. Omega Psi Phi Fraternity Inc

    EIN 464307354 · Headquarters: APG, MD, US · Mutual & Membership Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Omega Psi Phi Fraternity Inc

    EIN 522279696 · Headquarters: Frederick, MD, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  45. Omega Psi Phi Fraternity Inc - Pi Omega Chapter

    EIN 520784751 · Headquarters: Baltimore, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  46. Omega Psi Phi Fraternity Inc Chi Delta Chapter

    EIN 237383286 · Headquarters: College Park, MD, US · Education · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  47. Omega Psi Phi Fraternity Inc Pi Epsilon Chapter

    EIN 526055725 · Headquarters: Princess Anne, MD, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  48. Omega Psi Phi Fraternity Pi Alpha

    EIN 521264675 · Headquarters: PRINCESS ANNE, MD, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  49. Omicron Association of Theta Xi

    EIN 232137337 · Headquarters: PARKTON, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  50. Omicron Delta Epsilon

    EIN 320309190 · Headquarters: Bowie State University, MD, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  51. Omicron Delta Epsilon International Honor Society in Economics Inc

    EIN 460498948 · Headquarters: Chestertown, MD, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  52. Omicron Delta Epsilon International Honor Society in Economics Inc

    EIN 900096160 · Headquarters: Salisbury, MD, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  53. Omicron Delta Epsilon Intl Honor Society in Economics Inc

    EIN 237348203 · Headquarters: College Park, MD, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  54. Omicron Delta Epsilon Intl Honor Society in Economics Inc

    EIN 237348204 · Headquarters: westminster, MD, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  55. Omicron Delta Epsilon Intl Honor Society in Economics Inc

    EIN 237348206 · Headquarters: Annapolis, MD, US · Education · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  56. Omicron Delta Sigma Service Foundation Inc

    EIN 812164661 · Headquarters: Clinton, MD, US · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  57. Omicron Kappa Upsilon Honorary Dental Society Supreme

    EIN 237133944 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  58. Omid Foundation USA

    EIN 900406873 · Headquarters: NORTH BETHESDA, MD, USA · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990

  59. Omni House Foundation Inc

    EIN 521679976 · Headquarters: GLEN BURNIE, MD, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2016 · Primary form: IRS Form 990-EZ

  60. Omni House Inc

    EIN 521226449 · Headquarters: GLEN BURNIE, MD, USA · Mental Health & Crisis Intervention · Latest available filing year: 2016 · Primary form: IRS Form 990

  61. Omnichen Solutions Inc

    EIN 465699430 · Headquarters: Upper Marlboro, MD, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. Omnified Resources for Innovation and Cognition Corp

    EIN 822357235 · Headquarters: Frederick, MD, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  63. Omnimuseum Project Inc

    EIN 462038016 · Headquarters: Sykesville, MD, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  64. Omniquest Youth Empowerment Initiative Inc

    EIN 853923587 · Headquarters: COLUMBIA, MD, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Omo Obanta Association Inc

    EIN 020617805 · Headquarters: RANDALLSTOWN, MD, US · Human Services · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  66. Omo Yoruba Association

    EIN 992659742 · Headquarters: Lanham, MD, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Omocha Express

    EIN 452032196 · Headquarters: Silver Spring, MD, US · International, Foreign Affairs & National Security · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  68. On Earth Peace Assembly Inc

    EIN 521223330 · Headquarters: NEW WINDSOR, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  69. On Est Ensemble Association

    EIN 832762112 · Headquarters: Rockville, MD, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. On Fire Ministry Inc

    EIN 474019370 · Headquarters: CUMBERLAND, MD, US · Religion Related · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  71. On Mission It

    EIN 832029999 · Headquarters: Walkersville, MD, US · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  72. On Our Own Inc

    EIN 521272167 · Headquarters: BALTIMORE, MD, USA · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. On Our Own of Anne Arundel County

    EIN 522178165 · Headquarters: ANNAPOLIS, MD, USA · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. On Our Own of Calvert County

    EIN 521865939 · Headquarters: Huntingtown, Maryland, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. On Our Own of Carroll County Inc

    EIN 522290119 · Headquarters: WESTMINSTER, MD, USA · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  76. On Our Own of Cecil County Inc

    EIN 522247960 · Headquarters: ELKTON, MD, USA · Human Services · Latest available filing year: 2023 · Primary form: IRS Form 990

  77. On Our Own of Frederick County Inc

    EIN 522046050 · Headquarters: FREDERICK, MD, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. On Our Own of Howard County Inc

    EIN 521899771 · Headquarters: COLUMBIA, MD, USA · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. On Our Own of Maryland Inc

    EIN 521812414 · Headquarters: Elkridge, MD, USA · Public & Societal Benefit · Latest available filing year: 2024 · Primary form: IRS Form 990

  80. On Our Own of Montgomery County Inc

    EIN 521366329 · Headquarters: GERMANTOWN, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  81. On Our Own of Prince George's County Incorporated

    EIN 521778955 · Headquarters: HYATTSVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  82. On Our Own of St Mary's Inc

    EIN 522148594 · Headquarters: Leonardtown, MD, USA · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  83. On the Ball-spinny Inc

    EIN 352299295 · Headquarters: GAITHERSBURG, MD, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. On the Flip Side Inc

    EIN 473989636 · Headquarters: BALTIMORE, MD, US · Mental Health & Crisis Intervention · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. On the Go Homeless Outreach Inc

    EIN 882615731 · Headquarters: GLEN BURNIE, MD, US · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. On the Heels of Greatness Inc

    EIN 202857584 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  87. On the Move Academy

    EIN 873486280 · Headquarters: Columbia, MD, US · Employment · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. On The Move Homeless Outreach Inc

    EIN 881808795 · Headquarters: Brooklyn, MD, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  89. On The Rebound Bulldog Rescue Foundation

    EIN 541906017 · Headquarters: Frederick, MD, US · Animal Related · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  90. On the Road Otr Theater Company

    EIN 814424599 · Headquarters: BALTIMORE, MD, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. On the Rock Athletics Inc

    EIN 853720479 · Headquarters: Linthicum Heights, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. On the Rock Ministries International Inc

    EIN 933189392 · Headquarters: Harwood, MD, US · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. On This Rock Missions Inc

    EIN 393274172 · Headquarters: Pittsville, MD, US · Religion Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. On-n-2 Golf Club

    EIN 061836822 · Headquarters: Waldorf, MD, US · Recreation & Sports · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  95. Oncology Foundation of Maryland and the District of Columbia Inc

    EIN 263066399 · Headquarters: SEVERNA PARK, MD, USA · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  96. ONE

    EIN 811653597 · Headquarters: Bethesda, MD, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. One Africa University of Computer Science Technology and Engineering

    EIN 882392511 · Headquarters: Laurel, MD, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  98. One Annapolis Inc

    EIN 853397505 · Headquarters: Annapolis, MD, US · Youth Development · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. One by 1

    EIN 271403693 · Headquarters: OLNEY, MD, US · Crime & Legal Related · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  100. One Church One Child of Maryland Inc

    EIN 522176441 · Headquarters: BALTIMORE, MD, US · Human Services · Latest available filing year: 2022 · Primary form: IRS Form 990-N

First page and all pages