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. International Society of Hospitality Consultants

    EIN 363741867 · Headquarters: ATLANTA, GA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  2. International Society of Hypnosis

    EIN 222678391 · Headquarters: OQUOSSOC, ME, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  3. International Society of Immunohistochemistry and Molecular

    EIN 812545901 · Headquarters: Seattle, WA, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  4. International Society of Nurses in Genetics

    EIN 521595057 · Headquarters: OKEMOS, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  5. International Society of Ocular Trauma Inc

    EIN 631276579 · Headquarters: BIRMINGHAM, AL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. International Society of Palm

    EIN 592411929 · Headquarters: PALM BEACH, FL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  7. International Society of Plastic and Aesthetic Nurses

    EIN 510164353 · Headquarters: BEVERLY, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. International Society of Professional Engineers Dba Rocky Mountain Ispe

    EIN 841326476 · Headquarters: BOULDER, CO, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  9. International Society of Psychiatric Genetics

    EIN 880293000 · Headquarters: Brentwood, TN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. International Society of Psychiatric-mental Health Nurses

    EIN 362905672 · Headquarters: WINDSOR, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  11. International Society of Psychoneuroendo Crinology Inc

    EIN 942902673 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  12. International Society of Quantum Biology and Pharmacology

    EIN 582196113 · Headquarters: Alachua, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. International Society of Radiology

    EIN 541609762 · Headquarters: RESTON, VA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  14. International Society of Regulatory Toxicology and Pharmacology

    EIN 521339083 · Headquarters: Washington DC, DC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  15. International Society of Rna Nanotechnology and Nanomedicine

    EIN 815297118 · Headquarters: Columbus, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. International Society of Science and Applied Technologies

    EIN 911641789 · Headquarters: METUCHEN, NJ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. International Society of the Daughters of the Utah Pioneers

    EIN 870610206 · Headquarters: Marion, UT, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  18. International Society of Transport Aircraft Trading

    EIN 521304567 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. International Society on Thrombosis and Haemostasis Inc

    EIN 237428305 · Headquarters: CHARLOTTE, NC, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  20. International Sound Foundation

    EIN 911024219 · Headquarters: BLAINE, WA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  21. International South California Wethepeople Leaders Alliance

    EIN 933418854 · Headquarters: LOS ANGELES, CA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  22. International Spa Association

    EIN 521733203 · Headquarters: LEXINGTON, KY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. International Space Development Authority Corporation

    EIN 453611051 · Headquarters: Castle Rock, CO, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  24. International Space Exploration and Colonization Company

    EIN 920125402 · Headquarters: Fairbanks, AK, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  25. International Space University Org Inc

    EIN 521511773 · Headquarters: WEBSTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  26. International Special Dietary Foods

    EIN 812483000 · Headquarters: New York, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. International Special Events Society

    EIN 541497642 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  28. International Special Events Society

    EIN 562483375 · Headquarters: Burien, WA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  29. International Special Events Society

    EIN 760544350 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  30. International Sporthorse Registry

    EIN 363486548 · Headquarters: BURLINGTON, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. International Sports & Culture Exch Ange Association

    EIN 394691445 · Headquarters: Fairfax, VA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. International Sports Coalition Inc

    EIN 592681356 · Headquarters: INDIANAPOLIS, IN, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. International Sports Group Inc

    EIN 330240950 · Headquarters: LA VERNE, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  34. International Sports Heroes Inc

    EIN 943103398 · Headquarters: SAN RAFAEL, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  35. International Sports Vision Association

    EIN 934378268 · Headquarters: Plano, TX, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  36. International Staple Nail and Tool Association

    EIN 952774099 · Headquarters: Schaumburg, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  37. International Stereotactic Radiosurgery Society - Isrs

    EIN 043146650 · Headquarters: GAINESVILLE, FL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  38. International Stevia Council Inc

    EIN 273003345 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. International Street Church Inc

    EIN 474182892 · Headquarters: Lake Worth, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. International Student Association of World Citizens Inc

    EIN 333824845 · Headquarters: JACKSONVILLE, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. International Student Fellowship

    EIN 237000440 · Headquarters: BROOKLYN PARK, MN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  42. International Student Organization

    EIN 522459916 · Headquarters: Fairmont, WV, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  43. International Students Inc

    EIN 530214853 · Headquarters: Colorado Springs, CO, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  44. International Stunt Association

    EIN 953651205 · Headquarters: SHERMAN OAKS, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  45. International Subsea Solutions

    EIN 464833701 · Headquarters: NEWPORT, OR, USA · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-PF

  46. International Sugarbeet & Dry Bean Expo

    EIN 450438729 · Headquarters: FARGO, ND, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. International Sunfish Class Association

    EIN 382928389 · Headquarters: Alpharetta, GA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  48. International Support for the Impacted Inc

    EIN 852502205 · Headquarters: Manhattan Beach, CA, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  49. International Surf Festival

    EIN 954233636 · Headquarters: Manhattan Beach, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  50. International Surface Fabricators A

    EIN 541841654 · Headquarters: INGOMAR, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. International Survey of Jewish Monuments

    EIN 371068098 · Headquarters: SYRACUSE, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. International Suspension Alliance

    EIN 471613204 · Headquarters: Dallas, TX, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  53. International Swaminarayan Satsang Org

    EIN 222290410 · Headquarters: NORWALK, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. International Swaminarayn Satsang Organation of Ch

    EIN 363246047 · Headquarters: Wheeling, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. International Sweat Equity Association

    EIN 413830003 · Headquarters: Buellton, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. International Symphony Orchestra of Sarnia and Port Huron

    EIN 237035763 · Headquarters: PORT HURON, MI, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  57. International Symposium on Electron Ion & Photon Beams

    EIN 222671062 · Headquarters: FAIRFIELD, NJ, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  58. International Systemic Health Organ

    EIN 480940716 · Headquarters: Prairie Village, KS, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. International Tai-chi Institute Inc

    EIN 133036263 · Headquarters: Flushing, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  60. International Tax Forum of Houston Inc

    EIN 760119170 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. International Tax Institute Inc C/o Amanda Nussbaum

    EIN 136121749 · Headquarters: NEW YORK, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  62. International Teamster Womens Caucus -Itwc-

    EIN 943175607 · Headquarters: Bellingham, WA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  63. International Teamsters Union 1149 Bsdw

    EIN 166045613 · Headquarters: BALDWINSVILLE, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  64. International Technology and Engineering Educators Association

    EIN 536019628 · Headquarters: RESTON, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  65. International Technology Law Association Inc

    EIN 237224265 · Headquarters: BEAVERTON, OR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  66. International Tenant Representative Alliance Inc

    EIN 541713002 · Headquarters: ATLANTA, GA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  67. International Test and Evaluation Association

    EIN 521174656 · Headquarters: FAIRFAX, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. International Texas Longhorn Assoc

    EIN 742563247 · Headquarters: GLEN ROSE, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  69. International Textile and Apparel A

    EIN 731037205 · Headquarters: TALLAHASSEE, FL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  70. International Theological Seminary

    EIN 953890724 · Headquarters: West Covina, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. International Thomas Merton Society

    EIN 161314862 · Headquarters: LOUISVILLE, KY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  72. International Threat Management Association

    EIN 392449890 · Headquarters: West Palm Beach, FL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  73. International Tirolean-trentino Organization of North America

    EIN 845011406 · Headquarters: Syracuse, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. International Titanium Association

    EIN 311092931 · Headquarters: THORNTON, CO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  75. International Town & Country Club Inc

    EIN 540697963 · Headquarters: FAIRFAX, VA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  76. International Toy Research Association-US Inc

    EIN 934398341 · Headquarters: Fort Wayne, IN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. International Trade and Development Education Foundation

    EIN 521315910 · Headquarters: Purcellville, VA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. International Trade Club of Chicago

    EIN 362081145 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. International Trade Council-red River Region

    EIN 721365819 · Headquarters: BOSSIER CITY, LA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. International Trademark Association

    EIN 131427696 · Headquarters: New York, NY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. International Traders of Iowa

    EIN 421275689 · Headquarters: Des Moines, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  82. International Training Center Technologies and Design

    EIN 352734032 · Headquarters: SPOKANE, WA, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  83. International Training Institute for the Sheet Metal & Air Conditioning Industry

    EIN 520914827 · Headquarters: FALLS CHURCH, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  84. International Transactional Analysis Association

    EIN 365118129 · Headquarters: PASADENA, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  85. International Transplant Nursing Society of Upstate New York

    EIN 823267411 · Headquarters: Fairport, NY, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  86. International Trauma Anesthesia and Critical Care Society

    EIN 521666937 · Headquarters: Lexington, KY, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  87. International Trauma Life Support

    EIN 630983720 · Headquarters: Irving, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  88. International Travel & Tourism Association of California

    EIN 814702101 · Headquarters: LOS ANGELES, CA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  89. International Trombone Association

    EIN 237306397 · Headquarters: NORMAN, OK, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  90. International Trotting & Pacing Assoc

    EIN 231692009 · Headquarters: North Manchester, IN, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  91. International Truck Parts Assoc Inc

    EIN 237454633 · Headquarters: GREAT FALLS, MT, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  92. International Typographical Union 7

    EIN 250732450 · Headquarters: BRIDGEVILLE, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  93. International Unattended Retail Ass Ociation

    EIN 301481047 · Headquarters: Vancouver, WA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. International Union 362 UAW

    EIN 381100654 · Headquarters: BAY CITY, MI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  95. International Union AAECC Local 3300

    EIN 222511697 · Headquarters: Orchard Park, NY, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  96. International Union Almalgamated Local 375 UAW

    EIN 381214708 · Headquarters: Marysville, MI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  97. International Union AMALGAMATED UAW 2270

    EIN 382868174 · Headquarters: EVART, MI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  98. International Union Automobile Aerospace &

    EIN 222580150 · Headquarters: Cranbury, NJ, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  99. International Union Automobile Local 649 Uaw

    EIN 382425668 · Headquarters: GRAND RAPIDS, MI, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  100. International Union Brewery Workers Local 9 UAW

    EIN 390181777 · Headquarters: Milwaukee, WI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

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