Unknown & Unclassified nonprofits

Unknown & Unclassified nonprofits. Browse 557,756 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. Mathematical Association of America

    EIN 237155837 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  2. Mathematical Association of America

    EIN 237155838 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Mathematical Association of America

    EIN 237155839 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  4. Mathematical Association of America

    EIN 237155840 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  5. Mathematical Association of America

    EIN 237155841 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Mathematical Association of America

    EIN 237155842 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  7. Mathematical Association of America

    EIN 237155843 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Mathematical Association of America

    EIN 237155844 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Mathematical Association of America

    EIN 237155845 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Mathematical Association of America

    EIN 237155846 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Mathematical Association of America

    EIN 237155847 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  12. Mathematical Association of America

    EIN 237155848 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Mathematical Association of America

    EIN 237155849 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Mathematical Association of America

    EIN 237155850 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Mathematical Association of America

    EIN 237155851 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  16. Mathematical Association of America

    EIN 237155852 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  17. Mathematical Association of America

    EIN 237155853 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  18. Mathematical Association of America

    EIN 237159375 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  19. Mathematical Association of America

    EIN 346524885 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Mathematical Association of America

    EIN 486120362 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  21. Mathematical Association of America

    EIN 510207470 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Mathematical Association of America

    EIN 756038595 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Mathematical Association of America

    EIN 836006620 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Mathematical Association of America Inc

    EIN 160743079 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Mathematical Optimization Society Inc

    EIN 232161580 · Headquarters: PHILADELPHIA, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Mathematical Reviews

    EIN 382489014 · Headquarters: ANN ARBOR, MI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Mathematics Association of Two-year Colleges of New Jersey Matycnj

    EIN 237389820 · Headquarters: Matawan, NJ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Mathematics Magic Incorporated

    EIN 270475480 · Headquarters: Torrance, CA, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  29. Mather Cemetery Association Inc

    EIN 066070029 · Headquarters: Norwalk, CT, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  30. Mather Connecting Pta

    EIN 844935997 · Headquarters: Munising, MI, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  31. Mather Faculty Physicians University Faculty Practice Corporation

    EIN 331468309 · Headquarters: Westbury, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  32. Mather Fund Richard Mather Fund

    EIN 156018423 · Headquarters: SYRACUSE, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  33. Mather Health System Inc

    EIN 113417615 · Headquarters: Port Jefferson, NY, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  34. Mather Place

    EIN 363776145 · Headquarters: EVANSTON, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  35. Mather Possibilities

    EIN 362856851 · Headquarters: EVANSTON, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  36. Matherville Community Club

    EIN 273635885 · Headquarters: Matherville, IL, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  37. Mathesis Publications Inc

    EIN 251464224 · Headquarters: Santa Monica, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Matheson Memorial Library Association

    EIN 570426943 · Headquarters: Cheraw, SC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Matheson Memorial Library Foundation Inc

    EIN 391693710 · Headquarters: ELKHORN, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  40. Mathetes Reformed Theological College and Seminary

    EIN 260284043 · Headquarters: Los Angeles, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Mathews Band Boosters

    EIN 341348581 · Headquarters: VIENNA, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  42. Mathews Boat Club

    EIN 237172268 · Headquarters: Mathews, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Mathews County Master Gardeners

    EIN 542171305 · Headquarters: north, VA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  44. Mathews Education Association

    EIN 541052896 · Headquarters: Henrico, VA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  45. Mathews Elementary PTA

    EIN 581382244 · Headquarters: Midland, GA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  46. Mathews Foundation

    EIN 436351190 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  47. Mathews Jos J for Missions

    EIN 256018767 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  48. Mathews Lions Club

    EIN 270359718 · Headquarters: MATHEWS, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  49. Mathews Little League Baseball Inc

    EIN 541126308 · Headquarters: MATHEWS, VA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  50. Mathews Little Mustangs Inc

    EIN 341965241 · Headquarters: VIENNA, OH, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  51. Mathews Narcotics K9 Fund

    EIN 943461613 · Headquarters: mathews, VA, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  52. Mathews Volunteer Fire Dept Inc

    EIN 237267141 · Headquarters: MATHEWS, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Mathews Volunteer Rescue Squad Inc

    EIN 237274534 · Headquarters: HUDGINS, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Mathias Civic Center Association

    EIN 341017815 · Headquarters: Mathias, WV, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Mathilde Fund Inc

    EIN 237228226 · Headquarters: Louisville, KY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Mathilde U and Albert Elser Foundation

    EIN 396044395 · Headquarters: Milwaukee, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  57. Mathis A&H Booster Club

    EIN 832033987 · Headquarters: Mathis, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  58. Mathis Pfohl Foundation

    EIN 116013764 · Headquarters: LONG ISLAND CITY, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  59. Mathison Retirement Community

    EIN 462392994 · Headquarters: BIRMINGHAM, AL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Mati Infusion

    EIN 842817614 · Headquarters: DALLAS, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  61. Matie R Viles Crut

    EIN 856009723 · Headquarters: CLAYTON, MO, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  62. Matilda and Murray Blackstone Foundation

    EIN 521538719 · Headquarters: BETHESDA, MD, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  63. Matilda Bird Sprogell

    EIN 236254565 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  64. Matilda Detweiller Fbo Park District

    EIN 376029831 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  65. Matilda Geddings Gray Foundation

    EIN 237072892 · Headquarters: Lake Charles, LA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  66. Matilda H Bretz

    EIN 236201530 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  67. Matilda J Ramsey

    EIN 526026135 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  68. Matilda Neely Crans

    EIN 246021546 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-PF

  69. Matilda R Wilson Fund

    EIN 386087665 · Headquarters: DETROIT, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  70. Matinburg Cemetery Perpetual

    EIN 756035055 · Headquarters: PITTSBURG, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Matinecock Neighborhood Association

    EIN 116011643 · Headquarters: LOCUST VALLEY, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  72. Matins Inc C/o Lutheran Social Services of Illinois

    EIN 364376713 · Headquarters: DES PLAINES, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. Mativ Employee Benefit Fund

    EIN 386078116 · Headquarters: Munising, MI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Matiya Patidar Samaj of Florida Inc

    EIN 263605442 · Headquarters: ORLANDO, FL, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  75. Matlock Community Church

    EIN 911229585 · Headquarters: Elma, WA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  76. Matoaca Middle School PTSA

    EIN 521289060 · Headquarters: S Chesterfield, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Matoaka Area Volunteer Fire Department Inc

    EIN 550748259 · Headquarters: Matoaka, WV, USA · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990

  78. Matoaka Elementary School Pta

    EIN 260482081 · Headquarters: WILLIAMSBURG, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Matranga Marco Irrevocable Trust

    EIN 436638789 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  80. Matred Carlton Olliff Foundation

    EIN 592241303 · Headquarters: WAUCHULA, FL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  81. Matriarchal Motive Inc

    EIN 471158721 · Headquarters: Fort Worth, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  82. Matriots Action Fund

    EIN 871554685 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  83. Matrix Foundation Inc

    EIN 223231774 · Headquarters: CRANBURY, NJ, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  84. Matrix Human Services

    EIN 381358015 · Headquarters: Detroit, MI, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  85. Matrix LifeCare Center Inc

    EIN 310971746 · Headquarters: Lafayette, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Matrix Sustainable Development and Wellness

    EIN 261141005 · Headquarters: Socorro, NM, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  87. Mats Mats Bay Waterfront Owners Association

    EIN 813949070 · Headquarters: Port Ludlow, WA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  88. Matsch Family Charitable Foundation

    EIN 481141176 · Headquarters: LENEXA, KS, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  89. Matsunaga Charitable Foundation C/o Matthew M Matsunaga

    EIN 990290102 · Headquarters: HONOLULU, HI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  90. Matt & Amanda Creason Foundation

    EIN 852351499 · Headquarters: Dallas, TX, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  91. Matt 25 40 Group Inc

    EIN 870877970 · Headquarters: Broken Arrow, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  92. Matt Brown and Bob Hall Memorial 5K

    EIN 010947371 · Headquarters: morgan, PA, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  93. Matt H Dobson Foundation

    EIN 626036159 · Headquarters: FRANKLIN, TN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  94. Matt Riley Memorial Scholarship

    EIN 863892133 · Headquarters: Weare, NH, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  95. Matt Shetka Golf Foundation

    EIN 462540947 · Headquarters: New Prague, MN, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  96. Matt Z Foundation

    EIN 331443547 · Headquarters: Three Rivers, MA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  97. Mattabeseck Audubon Society Inc

    EIN 237400565 · Headquarters: Middletown, CT, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  98. Mattamuskeet Waterfowl Tomorrow

    EIN 237348156 · Headquarters: Swan Quarter, NC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Mattanawcook Terrace Housing Corp

    EIN 010325912 · Headquarters: BANGOR, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Mattapally Technologies

    EIN 850754154 · Headquarters: Birmingham, AL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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