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 Right of Way

    EIN 943090239 · Headquarters: Austin, TX, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  2. International Right of Way Association

    EIN 556023690 · Headquarters: CHARLESTON, WV, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  3. International Ripple Business Association Inc

    EIN 472559696 · Headquarters: Washington, DC, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  4. International Road Educational Foundation

    EIN 520793883 · Headquarters: ALEXANDRIA, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  5. International Road Federation

    EIN 530207484 · Headquarters: ALEXANDRIA, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  6. International Rsesa

    EIN 237382268 · Headquarters: N RICHLND HLS, TX, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  7. International Safe Transit Association

    EIN 237316359 · Headquarters: EAST LANSING, MI, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  8. International Safety Equipment Association Inc

    EIN 136167150 · Headquarters: ARLINGTON, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  9. International SalonSpa Business Network Inc

    EIN 222832382 · Headquarters: Bradenton, FL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. International Salsa Organization

    EIN 800514423 · Headquarters: Hilo, HI, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  11. International Sangha Bhksu Buddhist Assoc Phap Vien Minh Dang Quang

    EIN 953692543 · Headquarters: TAMPA, FL, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990

  12. International Sanitary Supply Association

    EIN 362027076 · Headquarters: Rosemont, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  13. International Saw and Knife Association

    EIN 911113860 · Headquarters: Kingston, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. International School at Dundee PTA

    EIN 421682765 · Headquarters: Riverside, CT, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. International School for Mental Health Practitioners

    EIN 232115645 · Headquarters: Staten Island, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. International School in Genoa

    EIN 980031414 · Headquarters: GENOVA, GENOVA, IT · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  17. International School in Manila Foundation

    EIN 237044257 · Headquarters: Princeton, NJ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. International School of Belgrade Inc

    EIN 237197814 · Headquarters: WASHINGTON, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  19. International School of Hydrocarbon Measurement Inc

    EIN 731042758 · Headquarters: NORMAN, OK, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. International School of Indiana Inc

    EIN 351887161 · Headquarters: INDIANAPOLIS, IN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. International School Sports Organization

    EIN 932115053 · Headquarters: Sheridan, WY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. International Science Council

    EIN 980041970 · Headquarters: Paris, FR · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  23. International Sculpture Forum Inc

    EIN 263722475 · Headquarters: Sarasota, FL, US · Unknown & Unclassified · Latest available filing year: 2010 · Primary form: IRS Form 990-N

  24. International Seafarers Center of LBLA

    EIN 330162030 · Headquarters: Long Beach, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  25. International Seafarers' Center

    EIN 581544208 · Headquarters: Brunswick, Georgia, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  26. International Sealing Distribution Association

    EIN 411722960 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  27. International Seaplane Flyin Inc

    EIN 010467049 · Headquarters: Greenville, ME, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  28. International Secure Information Governance & Management Association

    EIN 860793925 · Headquarters: PHOENIX, AZ, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  29. International Security Committee

    EIN 814129788 · Headquarters: Davis, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  30. International Security Management Association

    EIN 222473337 · Headquarters: THAYER, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  31. International Security Officers Police & Guards Union

    EIN 135681046 · Headquarters: Bayonne, NJ, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. International Seniors Amateur Golf Society Inc

    EIN 592803351 · Headquarters: MARSTONS MILLS, MA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. International Service Fellowship

    EIN 231644377 · Headquarters: UPPER DARBY, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. International Shellfish Restoration Society Isrs Inc

    EIN 392829151 · Headquarters: Silver Spring, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. International Shen Therapy Association

    EIN 911599241 · Headquarters: STOCKTON, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. International Ship Masters Assoc

    EIN 237584760 · Headquarters: Sheboygan, WI, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  37. International Ship Masters Association

    EIN 160817458 · Headquarters: Clayton, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. International Ship Masters Association

    EIN 237584757 · Headquarters: Clyde, MI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. International Ship Masters Association

    EIN 237584759 · Headquarters: West Salem, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. International Ship Masters Association

    EIN 237584762 · Headquarters: TOLEDO, OH, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. International Ship Masters Association

    EIN 770618460 · Headquarters: LAKEVIEW, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. International Ship Masters Association

    EIN 901499681 · Headquarters: Metamora, MI, US · Unknown & Unclassified · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  43. International Shrine Clown Association ISCA

    EIN 351388992 · Headquarters: Forney, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  44. International Shrine Horse Patrol

    EIN 251415986 · Headquarters: Wilson, NC, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. International Side Saddle Organization

    EIN 341407552 · Headquarters: Wildwood, MO, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  46. International Silken Windhound Society

    EIN 274813520 · Headquarters: STANTON, CA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. International Silo Association

    EIN 610491239 · Headquarters: THORP, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. International Sister Cities of Rochester New York

    EIN 222249963 · Headquarters: Rochester, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. International Sisterhood of Latinas for Aviation

    EIN 331598731 · Headquarters: SAN ANTONIO, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. International Skeletal Society Endowment Fund

    EIN 220436815 · Headquarters: EAST DUNDEE, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. International Skeletal Society Inc

    EIN 237366930 · Headquarters: EAST DUNDEE, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  52. International Skydiving Museum & Hall of Fame

    EIN 237181972 · Headquarters: Fredericksburg, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. International Sled Dog Racing Association Inc

    EIN 237389765 · Headquarters: Marshall, MI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  54. International Sleep Products Association

    EIN 530218747 · Headquarters: ALEXANDRIA, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. International Sleep Science Technol Ogy Association

    EIN 414812598 · Headquarters: HOUSTON, TX, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  56. International Slurry Surfacing Association

    EIN 741509600 · Headquarters: GLEN ELLYN, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  57. International Snowmobile Manufacturers Association Inc

    EIN 383230044 · Headquarters: PLYMOUTH, MI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  58. International Snowmobile Racing Hall of Fame Inc

    EIN 391547859 · Headquarters: SAINT GERMAIN, WI, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. International Soc of Neurovirology

    EIN 232958381 · Headquarters: PHILADELPHIA, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. International Soceity of Oral Oncology

    EIN 943086524 · Headquarters: Olympia, WA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. International Society Daughters of Utah Pioneers

    EIN 050527323 · Headquarters: Roseville, CA, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  62. International Society Daughters of Utah Pioneers

    EIN 421825211 · Headquarters: Rush Valley, UT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  63. International Society Daughters of Utah Pioneers

    EIN 800259308 · Headquarters: Salem, UT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. International Society Daughters of Utah Pioneers

    EIN 822236245 · Headquarters: Montpelier, ID, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  65. International Society Daughters of Utah Pioneers

    EIN 861887303 · Headquarters: Mona, UT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. International Society for Agricultural Safety and Health Inc

    EIN 396076468 · Headquarters: LAGRANGE, GA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  67. International Society for Anaesthetic Pharmacology

    EIN 363629362 · Headquarters: Milwaukee, WI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. International Society for Animal Rights

    EIN 530257197 · Headquarters: CLARKS SUMMIT, PA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  69. International Society for Arts Science and Technology DBA LeonardoISAST

    EIN 942863843 · Headquarters: Oakland, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  70. International Society for Asphalt Pavements Inc

    EIN 742515375 · Headquarters: LINO LAKES, MN, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  71. International Society for British Genealogy A

    EIN 341273012 · Headquarters: Denver, CO, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  72. International Society for Cellular Therapy

    EIN 521809771 · Headquarters: VANCOUVER, BRITISH COLUMBIA, CA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. International Society for Chinese Philosophy

    EIN 510151089 · Headquarters: Honolulu, HI, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. International Society for Dermatological Surgery Inc

    EIN 363231575 · Headquarters: DARMSTADT, DARMSTADT, GM · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  75. International Society for Developmental Nuerosciences

    EIN 942766046 · Headquarters: Liege, Li, BE · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  76. International Society for Digital Imaging of Skin Inc

    EIN 510362563 · Headquarters: Muncie, IN, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  77. International Society for Ethical Psychology and Psychiatry Inc

    EIN 237378417 · Headquarters: Welcome, MD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. International Society for Experimental Hematology

    EIN 237282003 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  79. International Society for Eye Research

    EIN 510171667 · Headquarters: CORALVILLE, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  80. International Society for Gynecologic Endoscopy Inc

    EIN 521590336 · Headquarters: new york, NY, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  81. International Society for Heart & Lung Transplantation

    EIN 363142246 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  82. International Society for Holter and Noninvasive Electrocardiology

    EIN 161477014 · Headquarters: Chicago, IL, United States · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  83. International Society for Human Rescue19

    EIN 863371046 · Headquarters: SANTA MONICA, CA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  84. International Society for Islamic Legal Studies

    EIN 202610323 · Headquarters: New Haven, CT, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  85. International Society for Krishna Consciousness Of Washington

    EIN 910987890 · Headquarters: Sammamish, WA, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-T

  86. International Society for Mexico Energy

    EIN 821237762 · Headquarters: Houston, TX, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  87. International Society for Neuroethology

    EIN 330103940 · Headquarters: Glen Allen, VA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  88. International Society for Organ Pre Servation and Perfusion Therapy

    EIN 412398045 · Headquarters: Oklahoma City, OK, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  89. International Society for Pediatric Innovation Inc

    EIN 822979804 · Headquarters: ORANGE, CA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  90. International Society for Pharmaceutical Engineering Inc

    EIN 561780932 · Headquarters: RALEIGH, NC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  91. International Society for Pharmaceutical Engineering Inc

    EIN 592009272 · Headquarters: TAMPA, FL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  92. International Society for Pharmaceutical Engineering Inc San Diego Chapter

    EIN 330551783 · Headquarters: VISTA, CA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  93. International Society for Pharmaceutical Engineering New Jersey Chapter Inc

    EIN 223151707 · Headquarters: LAKE HIAWATHA, NJ, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  94. International Society for Pharmacoepidemiology

    EIN 411688677 · Headquarters: Washington, DC, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. International Society for Philosophical Enquiry

    EIN 990216933 · Headquarters: PIEDMONT, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. International Society for Portuguese Philately

    EIN 853103026 · Headquarters: Blackwood, NJ, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  97. International Society for Preventive Oncology

    EIN 237389140 · Headquarters: MIDDLEBURG, FL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  98. International Society for Professional Education

    EIN 942596137 · Headquarters: San Francisco, CA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  99. International Society for Research on Aggression

    EIN 237268264 · Headquarters: BOWLING GREEN, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  100. International Society for Safe Sedation

    EIN 461178422 · Headquarters: SALT LAKE CITY, UT, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

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