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. National Coalition of 100 Black Women Inc

    EIN 521592873 · Headquarters: Riverdale, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  2. National Coalition of American Nuns

    EIN 237273905 · Headquarters: Mount Rainier, MD, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  3. National Conference of Law Enforcement Emerald Societies

    EIN 521955374 · Headquarters: BELAIR, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  4. National Conference of State Societies Washington District of C

    EIN 521907322 · Headquarters: Takoma Park, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  5. National Contract Management Association

    EIN 274523034 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  6. National Contract Management Association

    EIN 521997106 · Headquarters: Rockville, MD, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  7. National Contract Management Association

    EIN 752977914 · Headquarters: Chester, MD, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  8. National Correctional Industries Association Inc

    EIN 521132597 · Headquarters: HALETHORPE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. National Counc of Negro Women Inc

    EIN 911917320 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  10. National Council for Geocosmic Research Inc

    EIN 522013894 · Headquarters: Crownsville, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. National Council for Geographic Education

    EIN 046050994 · Headquarters: Gaithersburg, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  12. National Council for Languages and International Studies

    EIN 521221108 · Headquarters: GARRETT PARK, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. National Council of Negro Women Inc

    EIN 853002114 · Headquarters: Waldorf, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  14. National Council of Negro Women Inc

    EIN 911917322 · Headquarters: Capitol Heights, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  15. National Council of Negro Women Inc

    EIN 911917323 · Headquarters: Silver Spring, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. National Council of Negro Women Inc

    EIN 911931345 · Headquarters: Silver Spring, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  17. National Council of Negro Women Inc Calvert County Section

    EIN 333948333 · Headquarters: Owings, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. NATIONAL COUNCIL OF NEGRO WOMEN INC Mitchellville-Bowie Section

    EIN 911931339 · Headquarters: Largo, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  19. National Council on Family Relations

    EIN 260066214 · Headquarters: Towson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. National Customs Brokers & Forwarders Association of America Inc

    EIN 135544472 · Headquarters: SILVER SPRING, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. National Disability Cdfi Coalition

    EIN 832793397 · Headquarters: BETHESDA, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  22. National Duckpin Bowling Congress Inc

    EIN 530205583 · Headquarters: Linthicum, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  23. National Duckpin Youth Association

    EIN 237272631 · Headquarters: Pasadena, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  24. National Education Institutes Inc

    EIN 521390186 · Headquarters: Rockville, MD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  25. National Electrical Contractors Association Maryland Chapter

    EIN 520583587 · Headquarters: Hanover, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. National Electronics Museum Inc

    EIN 521226197 · Headquarters: Hunt Valley, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  27. National Emergency Training Center

    EIN 521397650 · Headquarters: EMMITSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  28. National Environmental Balancing Bureau Inc

    EIN 237180848 · Headquarters: GAITHERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. National Fallen Firefighters Foundation

    EIN 521832634 · Headquarters: EMMITSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. National Family Resiliency Center Inc

    EIN 521702813 · Headquarters: COLUMBIA, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. National Federation of Families for Children's Mental Health

    EIN 521671408 · Headquarters: GAITHERSBURG, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. National Federation of the Blind of Maryland Inc

    EIN 521301033 · Headquarters: Baltimore, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. National Federation of the Blind Service Foundation Inc

    EIN 521460968 · Headquarters: Baltimore, MD, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  34. National Fire Sprinkler Association Inc

    EIN 131878775 · Headquarters: LINTHICUM HEIGHTS, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. National Fire Sprinkler Industry Promotion Fund

    EIN 222667267 · Headquarters: LINTHICUM HEIGHTS, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. National Foster Parent Association

    EIN 060899870 · Headquarters: HAGERSTOWN, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. National Foundation for Infectious Diseases

    EIN 237198530 · Headquarters: BETHESDA, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. National Gaucher Care Foundation Inc

    EIN 521815708 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. National Grange of the Patrons of Husbandry

    EIN 831670750 · Headquarters: Rising Sun, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. National Guard Association of Maryland

    EIN 521245227 · Headquarters: Essex, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  41. National History Day Inc

    EIN 341262642 · Headquarters: College Park, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  42. National Home Library Foundation

    EIN 526051013 · Headquarters: Chevy Chase, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  43. National IAM Benefit Trust Fund

    EIN 366562520 · Headquarters: Beltsville, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. National Industrial Transportation League

    EIN 530115560 · Headquarters: DUNKIRK, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  45. National Institute for Electro Medical Information Inc

    EIN 112725581 · Headquarters: Nottingham, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. National Institute for Parent Training and Child Development

    EIN 815262002 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  47. National Institute of Packaging Handling and Logistics Engineers

    EIN 526053188 · Headquarters: PERRY HALL, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  48. National Intelligence Education Foundation Inc

    EIN 521392126 · Headquarters: BETHESDA, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. National Ives Royal Order of Jesteretts

    EIN 521356057 · Headquarters: Middle River, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. National Ives Royal Order of Jesteretts

    EIN 521356058 · Headquarters: White Plains, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. National Kappa Kappa Iota Inc

    EIN 742307869 · Headquarters: Mt Airy, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  52. National Kitchen & Bath Assoc

    EIN 541516046 · Headquarters: Gaithersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. National League for Nursing Inc

    EIN 530239798 · Headquarters: La Plata, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  54. National Marine Educators Association

    EIN 050413784 · Headquarters: College Park, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  55. National Marine Electronics Association

    EIN 510137740 · Headquarters: Severna Park, MD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  56. National Metal Decorators Association Inc

    EIN 366068106 · Headquarters: Sykesville, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. National Minority Health Association

    EIN 222828038 · Headquarters: Owings Mills, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  58. National Non-profit Alliance

    EIN 990500493 · Headquarters: Clarksburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  59. National Opossum Society Inc

    EIN 330562308 · Headquarters: CATONSVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  60. National Organization for Women Inc

    EIN 521163839 · Headquarters: Rockville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. National Organization for Women Inc

    EIN 521163845 · Headquarters: Chesapeake Beach, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. National Organization for Women Inc

    EIN 521309804 · Headquarters: HYATTSVILLE, MD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  63. National Organization of Alpha Sigma Kappa Women in Technical Stu

    EIN 202382571 · Headquarters: BALTIMORE, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  64. National Organization of Alpha Sigma Kappa Women in Technical Stu

    EIN 261187197 · Headquarters: Finksburg, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. National Organization of Bar Counsel Inc

    EIN 521090005 · Headquarters: ROCKVILLE, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. National Organization of Black Law Enforcement Executives Noble

    EIN 521497468 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. National Organization of Mothers of Twins Clubs Inc

    EIN 522215805 · Headquarters: FREDERICK, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. National Organization of Mothers of Twins Clubs Inc

    EIN 522319992 · Headquarters: ARNOLD, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  69. National Pan Hellenic Council Prince Georges County

    EIN 853870330 · Headquarters: Capitol Heights, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. National Pan-hellenic Council of Howard County

    EIN 352896053 · Headquarters: Ellicott City, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. National Phlebotomy Association

    EIN 521241927 · Headquarters: LANDOVER, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. National Plastering Industry Joint Apprenticeship Trust Fund

    EIN 520852330 · Headquarters: COLUMBIA, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. National Railway Historical Society Potomac Chapter Inc

    EIN 237352861 · Headquarters: Kensington, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. National Rural Letter Carriers Association

    EIN 237233949 · Headquarters: Baltimore, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. National Rural Letter Carriers Association

    EIN 237233950 · Headquarters: Westover, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  76. National Rural Letter Carriers Association

    EIN 237233951 · Headquarters: Williamsport, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. National Rural Letter Carriers Association

    EIN 237233952 · Headquarters: Sudlersville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. National Rural Letter Carriers Association

    EIN 581859185 · Headquarters: Pasadena, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. National Sane-freeze Education Fund

    EIN 521120499 · Headquarters: Silver Spring, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. National School Public Relations Association

    EIN 541794524 · Headquarters: Rockville, MD, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  81. National School Public Relations Association

    EIN 911904080 · Headquarters: Derwood, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  82. National Sikh Ctr Charitable Trust

    EIN 526410942 · Headquarters: GERMANTOWN, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  83. National Society Colonial Dames Xvii Century

    EIN 237395035 · Headquarters: Colora, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  84. National Society Colonial Dames Xvii Century

    EIN 521131816 · Headquarters: Bel Air, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. National Society Dames of the Court of Honor

    EIN 521277009 · Headquarters: Derwood, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. National Society Daughters of Founders & Patriots of America

    EIN 237584651 · Headquarters: Olney, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  87. National Society Daughters of Founders & Patriots of America

    EIN 237584662 · Headquarters: Gaithersburg, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  88. National Society for Histotechnology

    EIN 521111284 · Headquarters: ELLICOTT CITY, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  89. National Society of Descendants of Lords of the Maryland Manors Inc

    EIN 526073773 · Headquarters: Waldorf, MD, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  90. National Society of Natural-born Citizens of the Unite

    EIN 453577017 · Headquarters: Nottingham, MD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  91. National Society of New England Women

    EIN 460570089 · Headquarters: Upper Marlboro, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  92. National Society of Pershing Rifles Alumni Association Nspraa Inc

    EIN 204151252 · Headquarters: Mount Rainier, MD, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  93. National Society of Professional Surveyors Inc

    EIN 521730229 · Headquarters: Frederick, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. National Society of Southern Dames of America Inc

    EIN 521662317 · Headquarters: Rockville, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. National Society of the Children of the American Revolution

    EIN 237248854 · Headquarters: Towson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. National Society of the Children of the American Revolution

    EIN 262174549 · Headquarters: Towson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. National Society of the Children of the American Revolution

    EIN 262246830 · Headquarters: Towson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  98. National Society of the Children of the American Revolution

    EIN 262340446 · Headquarters: Towson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. National Society of the Children of the American Revolution

    EIN 262821205 · Headquarters: Towson, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. National Society of the Children of the American Revolution

    EIN 743255749 · Headquarters: Towson, MD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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