Unknown & Unclassified nonprofits in Maryland

Unknown & Unclassified nonprofits in Maryland. Browse 10,672 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. American Legion Caroline Post #29

    EIN 520845050 · Headquarters: DENTON, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. American Legion Cook Pinkney 141

    EIN 526077931 · Headquarters: Annapolis, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  3. American Legion Department of Maryland Parkville Post No 183 Incorporated

    EIN 520573273 · Headquarters: PARKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  4. American Legion Department of Md Chesapeake Post No 127 Inc

    EIN 465452180 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. American Legion Dept of Maryla Southern Maryland Region

    EIN 853160052 · Headquarters: CLINTON, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. American Legion Dept of MD

    EIN 521054164 · Headquarters: Indian Head, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. American Legion Dewey

    EIN 520741922 · Headquarters: Halethorpe, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. American Legion Duncan Showell

    EIN 526114481 · Headquarters: BERLIN, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  9. American Legion Edwin Adams Post 293

    EIN 521100871 · Headquarters: WALDORF, MD, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  10. American Legion Farrady Post 2

    EIN 520222818 · Headquarters: FROSTBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. American Legion Francis Scott Key Post11

    EIN 520222819 · Headquarters: FREDERICK, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. American Legion General Colin L Powell Post 809

    EIN 981909404 · Headquarters: White Hall, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. American Legion Greenbelt Post 136 Inc

    EIN 520661847 · Headquarters: GREENBELT, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. American Legion Harry White Wilmer Post 82

    EIN 520614435 · Headquarters: LA PLATA, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. American Legion Hesson Snider Post 120

    EIN 520851965 · Headquarters: TANEYTOWN, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  16. American Legion Inc Maryland District 0001

    EIN 853220061 · Headquarters: Rock Hall, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. American Legion Inc Morris Frock Post 42

    EIN 520222817 · Headquarters: HAGERSTOWN, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. American Legion Inc Post 202

    EIN 520565993 · Headquarters: WILLIAMSPORT, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. American Legion Post

    EIN 521617057 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  20. American Legion Post #187

    EIN 526077910 · Headquarters: CURTIS BAY, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. American Legion Post #93

    EIN 520567968 · Headquarters: Pocomoke City, MD, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  22. American Legion Post 0017

    EIN 520556555 · Headquarters: Edgewood, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. American Legion Post 0208

    EIN 526077897 · Headquarters: ACCIDENT, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. American Legion Post 0296

    EIN 521297405 · Headquarters: QUEENSTOWN, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. American Legion Post 10 Clopper Michael Post 10

    EIN 520576112 · Headquarters: BOONSBORO, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  26. American Legion Post 116

    EIN 526077945 · Headquarters: Reisterstown, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  27. American Legion Post 121

    EIN 520565988 · Headquarters: EMMITSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. American Legion Post 171

    EIN 526077915 · Headquarters: Damascus, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. American Legion Post 18 Jeff Davis

    EIN 520625125 · Headquarters: CENTREVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. American Legion Post 217

    EIN 520651432 · Headquarters: COLLEGE PARK, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  31. American Legion Post 221 of Southern Maryland

    EIN 526078376 · Headquarters: AVENUE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  32. American Legion Post 248 Inc

    EIN 526076045 · Headquarters: TEMPLE HILLS, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. American Legion Post 274

    EIN 520800071 · Headquarters: Lusby, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. American Legion Post 275 Glenarden

    EIN 526078030 · Headquarters: Glenarden, MD, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990

  35. American Legion Post 277 Pasadena

    EIN 526054900 · Headquarters: Pasadena, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. American Legion Post 34 - Patrick Henry

    EIN 526077988 · Headquarters: Brooklyn, MD, USA · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-EZ

  37. American Legion Post 38 Dundalk

    EIN 520572105 · Headquarters: BALTIMORE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. American Legion Post 7

    EIN 521311818 · Headquarters: ANNAPOLIS, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. American Legion Post 86

    EIN 526077959 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  40. American Legion Post No 268

    EIN 521060673 · Headquarters: WHEATON, MD, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  41. American Legion Ridge Post 255

    EIN 526078022 · Headquarters: RIDGE, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  42. American Legion Springhill Post 237

    EIN 521088546 · Headquarters: HEBRON, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  43. American Logistics Assn

    EIN 521876190 · Headquarters: Silver Spring, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. American Marketing Association

    EIN 521354840 · Headquarters: PIKESVILLE, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. American Medieval Combat Federation Llc

    EIN 825172384 · Headquarters: New Market, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  46. American Midwifery Certification Board

    EIN 521716709 · Headquarters: Columbia, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  47. American Nurses Association Inc

    EIN 131893923 · Headquarters: SILVER SPRING, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  48. American Nurses Credentialing Center

    EIN 431565726 · Headquarters: SILVER SPRING, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. American Occupational Therapy Association

    EIN 131526422 · Headquarters: BETHESDA, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. American Outlaws Baltimore Brigade Inc

    EIN 475660770 · Headquarters: Ellicott City, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  51. American Outlaws Dc Chapter

    EIN 455564711 · Headquarters: Rockville, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  52. American Pharmacists Association Academy of Student Pharmacists

    EIN 264629677 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. American Podiatric Medical Association Educational Foundation Inc

    EIN 521268752 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. American Podiatric Medical Association Inc

    EIN 530239502 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. American Postal Workers Accident Benefit Association

    EIN 520964452 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  56. American Postal Workers Union

    EIN 237021535 · Headquarters: Salisbury, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  57. American Postal Workers Union

    EIN 237345066 · Headquarters: CUMBERLAND, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  58. American Postal Workers Union

    EIN 520783415 · Headquarters: Baltimore, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. American Postal Workers Union

    EIN 526055370 · Headquarters: Hagerstown, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  60. American Postal Workers Union

    EIN 526070301 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  61. American Postal Workers Union 512 Southwest Maryland Bay Area Local

    EIN 521099388 · Headquarters: GAMBRILLS, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  62. American Postal Workers Union Afl Cio Health

    EIN 520940594 · Headquarters: ELKRIDGE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. American Postal Workers Union Afl-cio Health Plan Health and Welfare Trust Agreement

    EIN 522035053 · Headquarters: ELKRIDGE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. American Public University Student Chapter

    EIN 461776678 · Headquarters: Bethesda, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  65. American Railway Engineering and Maintenance-of-way Association

    EIN 360729465 · Headquarters: LANHAM, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. American Registry of Pathology

    EIN 521073470 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. American Rhododendron Society

    EIN 930863110 · Headquarters: Cockeysville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. American Rifle Association Inc

    EIN 301355077 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. American Rose Society

    EIN 581832648 · Headquarters: Salisbury, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  70. American Small Manufacturers Coalit

    EIN 382945771 · Headquarters: MT AIRY, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. American Society for Clinical Laboratory Science

    EIN 237082452 · Headquarters: Salisbury, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  72. American Society for Deaf Children

    EIN 521297104 · Headquarters: WOODBINE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. American Society for Pharmacology & Experimental Therapeutics Incorporated

    EIN 586032060 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  74. American Society for Photogrammetry and Remote Sensing Inc

    EIN 753029338 · Headquarters: Bethesda, MD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  75. American Society for Reconstructive Transplantation

    EIN 800214742 · Headquarters: Towson, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  76. American Society for Training and Development

    EIN 264703757 · Headquarters: Ellicott City, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. American Society of Agricultural Engineers

    EIN 311178891 · Headquarters: College Park, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. American Society of Agricultural Engineers

    EIN 521503913 · Headquarters: Laurel, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. American Society of Appraisers

    EIN 521484600 · Headquarters: Annapolis, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. American Society of Civil Engineers - Md

    EIN 237381285 · Headquarters: BALTIMORE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  81. American Society of Consulting Arborists

    EIN 237207366 · Headquarters: FOREST HILL, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  82. American Society of Heating Refrigerating & A-c Engineers

    EIN 261401704 · Headquarters: Westminster, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. American Society of Human Genetics

    EIN 521419397 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. American Society of Media Photographers Inc

    EIN 911913230 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. American Society of Plant Biologists

    EIN 530258999 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. American Society of Plumbing Engineers DbaBaltimore Chapter

    EIN 522040544 · Headquarters: Annapolis Junction, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  87. American Society of Psychoanalytic Physicians

    EIN 237156006 · Headquarters: Germantown, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. American Speech-Language-Hearing Association

    EIN 530240474 · Headquarters: Rockville, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. American Sports Builders Association

    EIN 132561230 · Headquarters: FOREST HILL, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  90. American String Teachers Association Incorporated

    EIN 141973107 · Headquarters: Joppa, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  91. American Sudanese Partnership Institution for Rehabilitation And

    EIN 873013020 · Headquarters: Silver Spring, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  92. American Synod Inc

    EIN 844231556 · Headquarters: Burtonsville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. American Trauma Society

    EIN 521047672 · Headquarters: Catonsville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. American Urogynecologic Society

    EIN 953388558 · Headquarters: SILVER SPRING, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. American Vaulting Association

    EIN 522346375 · Headquarters: Potomac, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. American Vaulting Association

    EIN 990509536 · Headquarters: La Plata, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. American Veterans of World War Ii Korea and Vietnam (Amvets)

    EIN 526067364 · Headquarters: HAGERSTOWN, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  98. American Veterans of World War Ii Korea and Vietnam (Amvets) Services Foun

    EIN 521167416 · Headquarters: HAGERSTOWN, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. American Veterans of World War Ii Sons of Amvets

    EIN 521942441 · Headquarters: MIDDLETOWN, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. American Veterans of Wwii-post 2 Sons of Amvets

    EIN 521721701 · Headquarters: FREDERICK, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

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