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. Masterworks Choir Inc

    EIN 570726675 · Headquarters: FLORENCE, SC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  2. Masterworks Choir of New Jersey

    EIN 223161192 · Headquarters: Ocean City, NJ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Masterworks Chorale

    EIN 046125155 · Headquarters: CAMBRIDGE, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  4. Masterworks Chorale Inc

    EIN 223021310 · Headquarters: Skaneateles, NY, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  5. Masterworks Chorale Inc

    EIN 310963441 · Headquarters: MUNCIE, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  6. Masterworks Chorale of Carroll County Inc

    EIN 521072706 · Headquarters: Westminster, MD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  7. Masterworks Inc

    EIN 232626603 · Headquarters: UNION, NJ, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  8. Mastery Charter School John Wister Campus

    EIN 812713543 · Headquarters: PHILADELPHIA, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. Mastery Charter School Pastorius - Richardson Elementary

    EIN 462846820 · Headquarters: PHILADELPHIA, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Mastery Transcript Consortium

    EIN 814974458 · Headquarters: WINCHESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. Mastic Beach Property Owners Associationinc

    EIN 111806996 · Headquarters: MASTIC BEACH, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Mastic Beach Yacht Club

    EIN 112256567 · Headquarters: MASTIC BEACH, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  13. Mastiff Club of America Charitable Trust

    EIN 134280101 · Headquarters: Round Lake, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Mastiff Club of Northern Ohio

    EIN 463830308 · Headquarters: Dublin, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. Mastiff Mafia Reset

    EIN 932388296 · Headquarters: Acton, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Mastin G Dplnvlle Cong Church

    EIN 066033798 · Headquarters: DALLAS, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  17. Mastocytosis-mcas Research Articles

    EIN 474178372 · Headquarters: Tucson, AZ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Mastran Family Foundation

    EIN 852435401 · Headquarters: GREAT FALLS, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  19. Mastrofrancesco Afc Inc

    EIN 382397664 · Headquarters: DEARBORN, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Mastrovich Anne V Scholarship Trus

    EIN 416292772 · Headquarters: SAINT LOUIS, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  21. Masud Temple No 69 of the Ancient Egyptian Arabic Order Nobles Mysti

    EIN 274835250 · Headquarters: West Palm Beach, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Masury Brookfield Womens Club

    EIN 800544124 · Headquarters: Masury, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Maszen Foundation

    EIN 413242511 · Headquarters: Marina, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Mat Assassins Inc

    EIN 851309922 · Headquarters: Avoca, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Mat Su Dirtfishers Association

    EIN 611755817 · Headquarters: Palmer, AK, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  26. Mat-su Alano Club Inc

    EIN 920093743 · Headquarters: WASILLA, AK, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  27. Mat-su Anglers

    EIN 270847352 · Headquarters: WASILLA, AK, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  28. Mat-su Back Country Horsemen of Alaska

    EIN 824802075 · Headquarters: Wasilla, AK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Mat-Su Crime Stoppers Inc

    EIN 943053631 · Headquarters: Palmer, AK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  30. Mat-Su Home Builders Association

    EIN 920062157 · Headquarters: Wasilla, AK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. Mat-su Miners Nugget Booster Club

    EIN 460878105 · Headquarters: PALMER, AK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  32. Mat-Su Services for Children & Adults Inc

    EIN 920107450 · Headquarters: WASILLA, AK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Mat-su Softball Association Inc

    EIN 920091325 · Headquarters: Wasilla, AK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  34. Mat-su Trails Council Inc

    EIN 920136165 · Headquarters: Palmer, AK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Mat-su Valley Alaska Writers Guild

    EIN 275012397 · Headquarters: Wasilla, AK, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  36. Matador Club

    EIN 200495157 · Headquarters: Athens, TX, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  37. Matadors Community Credit Union

    EIN 952276317 · Headquarters: Chatsworth, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  38. Matagorda County Board of Realtors Inc

    EIN 741467925 · Headquarters: AUSTIN, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Matagorda County Cattlemens Association

    EIN 760264368 · Headquarters: BAY CITY, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  40. Matagorda County Citizens Law Enforcement Academy Alumuni Associ

    EIN 455304933 · Headquarters: Bay City, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Matagorda County Credit Union

    EIN 746057015 · Headquarters: BAY CITY, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  42. Matagorda County Economic Development Corporation

    EIN 760455833 · Headquarters: BAY CITY, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  43. Matagorda County Farm Bureau

    EIN 741179153 · Headquarters: BAY CITY, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. Matagorda County Genealogical Society

    EIN 742202251 · Headquarters: Bay City, TX, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  45. Matagorda Waste Disposal & Water Supply Corporation

    EIN 741647728 · Headquarters: MATAGORDA, TX, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  46. Matalon Family Foundation Inc

    EIN 237419408 · Headquarters: BROOKLYN, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  47. Matamoras Emergency Squadinc

    EIN 310894259 · Headquarters: NEW MATAMORAS, OH, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  48. Matamoras Rod & Gun Club Inc

    EIN 452319279 · Headquarters: MATAMORAS, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  49. Matan Bseter

    EIN 382884963 · Headquarters: Southfield, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Matanchen Community Foundation

    EIN 465085799 · Headquarters: AUSTIN, TX, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  51. Matanuska Electric Association Inc

    EIN 920007954 · Headquarters: PALMER, AK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  52. Matanuska-susitna Borough Employees Association

    EIN 920059084 · Headquarters: Palmer, AK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  53. Matanuska-susitna Convention & Visitors Bureau

    EIN 920118165 · Headquarters: PALMER, AK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Matanuska-Susitna Education Association

    EIN 943086278 · Headquarters: Palmer, AK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. Matanza Lake Improvement

    EIN 376046385 · Headquarters: Havana, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  56. Matawan Historical Society

    EIN 237208666 · Headquarters: Matawan, NJ, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  57. Matawan-aberdeen Baseball League

    EIN 223137131 · Headquarters: Aberdeen, NJ, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  58. Matawan-Aberdeen First Aid Squad

    EIN 221925665 · Headquarters: Matawan, NJ, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  59. Matcat Wrestling Inc

    EIN 822897862 · Headquarters: Plantation, FL, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  60. Match Interactive Inc

    EIN 954231508 · Headquarters: Oceanside, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Match Point Tennis Academy Foundation

    EIN 882185050 · Headquarters: Santa Ana, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Match Point Tennis Club

    EIN 942930942 · Headquarters: Phoenix, AZ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. Mateeba Oaks Riding Club Inc

    EIN 843932508 · Headquarters: Summerville, SC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  64. Mateena Foundation Llc

    EIN 922795742 · Headquarters: Miami, FL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-PF

  65. Mater Dei Academy

    EIN 237102659 · Headquarters: COLUMBUS, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  66. Mater Dei Endowment for Education

    EIN 471126531 · Headquarters: Henderson, NV, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  67. Mater Dei Foundation Inc

    EIN 371249786 · Headquarters: CARLYLE, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Mater Ecclesiae Academy

    EIN 474668726 · Headquarters: SANTA CLARA, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  69. Mater Filius of Dallas Inc

    EIN 473925975 · Headquarters: Plano, TX, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  70. Material Advantage Student Chapter at Nc State

    EIN 412597936 · Headquarters: Raleigh, NC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  71. Material Advantage-uh Chapter

    EIN 465545537 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  72. Material Handling Educational Foundation Inc

    EIN 251303313 · Headquarters: CHARLOTTE, NC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  73. Material Handling Equipment Distributors Association

    EIN 362553797 · Headquarters: WAUCONDA, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  74. Material Handling Industry

    EIN 561596147 · Headquarters: CHARLOTTE, NC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. Material Needs Foundation

    EIN 812628698 · Headquarters: SPARKS, NV, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  76. Material Yard Workers Local 1175 Welfare Fund

    EIN 135679400 · Headquarters: ASTORIA, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  77. Materials Technology Institute Inc

    EIN 132892392 · Headquarters: SAINT LOUIS, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  78. Maternal Child Health Coalition of Northern Nevada

    EIN 880266554 · Headquarters: Reno, NV, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  79. Maternal Instincts Llc

    EIN 364750796 · Headquarters: WILLINGBORO, NJ, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  80. Maternal Rights

    EIN 843048091 · Headquarters: Dover, DE, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. Maternal-infant Services Network of Orangesullivan&ulster Counties Inc

    EIN 061286045 · Headquarters: NEWBURGH, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. Maternity and Early Childhood Fdn Inc

    EIN 141650131 · Headquarters: ALBANY, NY, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  83. Maternity Care Coalition

    EIN 232200410 · Headquarters: Philadelphia, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. Maternity Journey

    EIN 853839652 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  85. Matewan Convention & Visitors Bureau Inc

    EIN 821986197 · Headquarters: MATEWAN, WV, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  86. Math and Applied Math Galois Group

    EIN 923216761 · Headquarters: Davis, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  87. Math Circles of Chicago

    EIN 452071512 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. Math Movement Inc

    EIN 852148914 · Headquarters: Waxahachie, TX, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  89. Math Philanthropy

    EIN 464993073 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  90. Math Science and Technology Charter School - Neshaminy

    EIN 811475786 · Headquarters: PHILADELPHIA, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  91. Math Science Network of Greater St Louis

    EIN 431244656 · Headquarters: Saint Peters, MO, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Math Star Inc

    EIN 853996645 · Headquarters: Memphis, TN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. MATHCOUNTS Foundation

    EIN 541295407 · Headquarters: Alexandria, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  94. Mathematic in Action

    EIN 832822829 · Headquarters: Desoto, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  95. Mathematical Association of America

    EIN 116015911 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  96. Mathematical Association of America

    EIN 237155832 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  97. Mathematical Association of America

    EIN 237155833 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  98. Mathematical Association of America

    EIN 237155834 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Mathematical Association of America

    EIN 237155835 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  100. Mathematical Association of America

    EIN 237155836 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

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