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. Maryland Multi-housing Association Inc

    EIN 521995753 · Headquarters: OWINGS MILLS, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Maryland Municipal Clerks Association

    EIN 871904380 · Headquarters: Bowie, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  3. Maryland Museum of Electric Light Inc

    EIN 883267349 · Headquarters: Owings Mills, MD, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Maryland Museums Association Inc

    EIN 521933448 · Headquarters: BALTIMORE, MD, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  5. Maryland Music Educators Association

    EIN 526075299 · Headquarters: Beltsville, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. Maryland Mustang Mission Inc

    EIN 934839218 · Headquarters: STREET, MD, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Maryland Mutual Ufo Network Inc

    EIN 900574120 · Headquarters: Frederick, MD, US · Science & Technology · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  8. Maryland Naral Inc

    EIN 521218706 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Maryland National Capital Building Industry Association Inc

    EIN 520946998 · Headquarters: FULTON, MD, USA · Community Improvement & Capacity Building · Latest available filing year: 2014 · Primary form: IRS Form 990

  10. Maryland National Guard Foundation Inc

    EIN 521798637 · Headquarters: Middle River, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  11. Maryland National Guard Youth Challenge Foundation

    EIN 261433863 · Headquarters: Bel Air, MD, US · Youth Development · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Maryland National Road Association Inc

    EIN 043701216 · Headquarters: West Friendship, MD, US · Arts, Culture & Humanities · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  13. Maryland Native Plant Society

    EIN 521760762 · Headquarters: Silver Spring, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  14. Maryland Natural Resources Police Alumni Association Inc

    EIN 521980067 · Headquarters: Laurel, MD, US · Public & Societal Benefit · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Maryland Natural Resources Police Reserve Officer Association

    EIN 522238810 · Headquarters: Brandywine, MD, US · Public & Societal Benefit · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  16. Maryland Natural Resources Police Reserve Officer Association Inc

    EIN 371662069 · Headquarters: Annapolis, MD, US · Crime & Legal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Maryland Neighborly Networks Inc

    EIN 521415629 · Headquarters: BERWYN HEIGHTS, MD, USA · Human Services · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Maryland Network Against Domestic Violence Inc

    EIN 521233434 · Headquarters: ANNAPOLIS, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  19. Maryland Network for Injured Equestrians Inc

    EIN 202217823 · Headquarters: Jarrettsville, MD, US · Recreation & Sports · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  20. Maryland Neurosurgical Society Inc

    EIN 521134606 · Headquarters: Baltimore, MD, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Maryland New Directions Inc

    EIN 521021365 · Headquarters: BALTIMORE, MD, USA · Mental Health & Crisis Intervention · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Maryland Norml Inc

    EIN 471965175 · Headquarters: Baltimore, MD, US · Civil Rights, Social Action & Advocacy · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  23. Maryland Nurse Honor Guard

    EIN 394618902 · Headquarters: Burtonsville, MD, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Maryland Nursery Landscape and Greenhouse Association

    EIN 530261561 · Headquarters: BROOKLANDVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  25. Maryland Nurses Association

    EIN 526070413 · Headquarters: Abingdon, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Maryland Nurses Association

    EIN 526071882 · Headquarters: Abingdon, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Maryland Nurses Association Inc

    EIN 520405035 · Headquarters: ABINGDON, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. Maryland Nurses Association Inc

    EIN 520554407 · Headquarters: Abingdon, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Maryland Nurses Association Inc

    EIN 521089375 · Headquarters: Baltimore, MD, US · Community Improvement & Capacity Building · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  30. Maryland Nurses Association Inc

    EIN 521096088 · Headquarters: Abingdon, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Maryland Nurses Association Inc

    EIN 521096090 · Headquarters: Abingdon, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Maryland Nurses Association Inc

    EIN 526059724 · Headquarters: Abingdon, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Maryland Nurses Association Inc

    EIN 526078309 · Headquarters: Abingdon, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  34. Maryland Occupational Therapy Association Inc Occupational Thera

    EIN 521097532 · Headquarters: Towson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Maryland Off-highway Vehicle Alliance Inc

    EIN 462387199 · Headquarters: Columbia, MD, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Maryland Oncology Hematology Cares Foundation Inc

    EIN 873113740 · Headquarters: COLUMBIA, MD, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Maryland One Chapter Red Knights Intl Motorcycle Club

    EIN 204248352 · Headquarters: LAUREL, MD, US · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  38. Maryland Onsite Wastewater P A

    EIN 202130265 · Headquarters: Ellicott City, MD, USA · Community Improvement & Capacity Building · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. Maryland Open Horse Show Series Inc

    EIN 465205582 · Headquarters: Highland, MD, US · Recreation & Sports · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Maryland Opera Company Inc

    EIN 264473756 · Headquarters: Ellicott City, MD, US · Arts, Culture & Humanities · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  41. Maryland Opera Inc

    EIN 270813566 · Headquarters: Baltimore, MD, USA · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. Maryland Operation Lifesaver Inc

    EIN 300281790 · Headquarters: Huntingtown, MD, US · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  43. Maryland Optometric Association

    EIN 520822684 · Headquarters: STEVENSON, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. Maryland Optometric Association Educational Foundation Inc

    EIN 521255996 · Headquarters: Stevenson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Maryland Optometric Association Inc

    EIN 237007931 · Headquarters: Stevenson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Maryland Optometric Association Inc

    EIN 237014612 · Headquarters: Baltimore, MD, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  47. Maryland Optometric Association Inc

    EIN 237015590 · Headquarters: Stevenson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Maryland Optometric Association Inc

    EIN 237015668 · Headquarters: Stevenson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Maryland Optometric Association Inc

    EIN 521307970 · Headquarters: Stevenson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Maryland Optometric Association Inc

    EIN 521307976 · Headquarters: Stevenson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. Maryland Orchid Society Inc

    EIN 521145937 · Headquarters: Mount Airy, MD, US · Environment · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. Maryland Organization of Nurse Leaders

    EIN 521566527 · Headquarters: Bel Air, MD, USA · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990

  53. Maryland Orioles Baseball Club Inc

    EIN 522073608 · Headquarters: Linthicum Heights, MD, US · Recreation & Sports · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  54. Maryland Ornithological Society

    EIN 526046316 · Headquarters: BALTIMORE, MD, USA · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. Maryland Ornithological Society Inc

    EIN 271473671 · Headquarters: Oakland, MD, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. Maryland Ornithological Society Inc

    EIN 272123935 · Headquarters: Chestertown, MD, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Maryland Ornithological Society Inc

    EIN 272145307 · Headquarters: Damascus, MD, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  58. Maryland Ornithological Society Inc

    EIN 272155278 · Headquarters: Bel Air, MD, US · Animal Related · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  59. Maryland Ornithological Society Inc

    EIN 272213958 · Headquarters: Annapolis, MD, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. Maryland Ornithological Society Inc

    EIN 272286630 · Headquarters: Easton, MD, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Maryland Ornithological Society Inc

    EIN 272495398 · Headquarters: Baltimore, MD, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Maryland Ornithological Society Inc

    EIN 272564645 · Headquarters: Columbia, MD, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Maryland Ornithological Society Inc

    EIN 272843805 · Headquarters: Frederick, MD, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Maryland Ornithological Society Inc

    EIN 273050423 · Headquarters: Hagerstown, MD, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Maryland Ornithological Society Inc

    EIN 273104334 · Headquarters: Salisbury, MD, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  66. Maryland Ornithological Society Inc

    EIN 273152009 · Headquarters: Sykesville, MD, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Maryland Ornithological Society Inc

    EIN 522318877 · Headquarters: Huntingtown, MD, US · Animal Related · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  68. Maryland Ornithological Society Inc

    EIN 800629342 · Headquarters: Elkton, MD, US · Animal Related · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Maryland Ornithological Society Inc

    EIN 800632176 · Headquarters: Denton, MD, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Maryland Orthopaedic Association

    EIN 521979179 · Headquarters: TOWSON, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  71. Maryland Osorey and Nature Festival Inc

    EIN 932269833 · Headquarters: Lusby, MD, US · Animal Related · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  72. Maryland Outfitters and Guides Association Inc

    EIN 204042013 · Headquarters: Chestertown, MD, US · Community Improvement & Capacity Building · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. Maryland Outlaws Hockey Inc

    EIN 992588192 · Headquarters: GERMANTOWN, MD, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Maryland Oystermen Association

    EIN 260844542 · Headquarters: EARLEVILLE, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Maryland Pain Initiative Inc

    EIN 223884218 · Headquarters: Baltimore, MD, US · Diseases, Disorders & Medical Disciplines · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  76. Maryland Partners of the Americas

    EIN 526059032 · Headquarters: Columbia, MD, US · International, Foreign Affairs & National Security · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Maryland Partnership for Prevention

    EIN 522188038 · Headquarters: OWINGS MILLS, MD, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Maryland Pastel Society Inc

    EIN 521138500 · Headquarters: Riderwood, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Maryland Patient Advocacy Group Inc

    EIN 522121879 · Headquarters: Ellicott City, MD, US · Health Care · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  80. Maryland Patient Safety Center Inc

    EIN 262188491 · Headquarters: ELKRIDGE, MD, USA · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Maryland Patriot Guard

    EIN 264385828 · Headquarters: Westminster, MD, US · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Maryland Peace Action Education Fund Inc

    EIN 521303680 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Maryland Performance Excellence Foundation Inc

    EIN 263820852 · Headquarters: Owings Mills, MD, US · Community Improvement & Capacity Building · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  84. Maryland Performing Arts Institute Inc

    EIN 371571803 · Headquarters: Arnold, MD, USA · Arts, Culture & Humanities · Latest available filing year: 2018 · Primary form: IRS Form 990-EZ

  85. Maryland Perinatal Education Consortium Inc

    EIN 823369193 · Headquarters: Towson, MD, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Maryland Pesticide Education Network

    EIN 463713793 · Headquarters: ANNAPOLIS, MD, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990

  87. Maryland Pharmaceutical Aid Inc

    EIN 452468497 · Headquarters: WHITE PLAINS, MD, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  88. Maryland Pharmaceutical Society Inc

    EIN 237216625 · Headquarters: Silver Spring, MD, US · Health Care · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. Maryland Pharmacists Association Foundation Incorporated

    EIN 237036163 · Headquarters: Columbia, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  90. Maryland Pharmacists Association Inc

    EIN 520543828 · Headquarters: COLUMBIA, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. Maryland Phi Kapp Phi Foundation

    EIN 470867408 · Headquarters: Columbia, MD, US · Education · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  92. Maryland Philanthropy Network

    EIN 521326863 · Headquarters: BALTIMORE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. Maryland Photography Alliance Inc

    EIN 872363023 · Headquarters: Sykesville, MD, US · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Maryland PIRG Foundation

    EIN 521033638 · Headquarters: Baltimore, MD, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Maryland Place Homes Corporation

    EIN 237156038 · Headquarters: Montgomery Village, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. Maryland Plumbing Heating Cooling Contractors of Md Inc

    EIN 520690180 · Headquarters: ELLICOTT CITY, MD, USA · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990

  97. Maryland Podiatric Medical Association C/o Richard Bloch the Adams Bldg

    EIN 521633485 · Headquarters: TOWSON, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  98. Maryland Pork Producers Association

    EIN 521341415 · Headquarters: CHESTER, MD, US · Food, Agriculture & Nutrition · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Maryland Portrait Foundation Incorporated

    EIN 200664361 · Headquarters: Kingsville, MD, US · Arts, Culture & Humanities · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  100. Maryland Potomac Valley Local Weigh Lifting Committee Inc

    EIN 471418755 · Headquarters: Catonsville, MD, US · Recreation & Sports · Latest available filing year: 2021 · Primary form: IRS Form 990-N

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