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. Sinton Municipal Golf Association

    EIN 741259637 · Headquarters: SINTON, TX, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990

  2. Sioga Club of Berkshire County Inc George B Crane Memorial Center

    EIN 042620389 · Headquarters: PITTSFIELD, MA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  3. Sior Arizona Inc

    EIN 471826078 · Headquarters: PHOENIX, AZ, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  4. SIOR Northern California Chapter

    EIN 942822416 · Headquarters: ORINDA, CA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  5. Sior Oregon Inc C/o Transpacific Dk Investments Llc

    EIN 262395230 · Headquarters: LAKE OSWEGO, OR, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  6. Sioux Center Chamber of Commerce

    EIN 426065836 · Headquarters: SIOUX CENTER, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Sioux Center Health

    EIN 420796764 · Headquarters: Sioux Center, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Sioux City Chamber Music Association

    EIN 421077538 · Headquarters: Sioux City, IA, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  9. Sioux City Country Club

    EIN 420527395 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Sioux City Education Association

    EIN 420940947 · Headquarters: Sioux City, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Sioux City Educational Support Personnel Association

    EIN 421373836 · Headquarters: Des Moines, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  12. Sioux City Futures

    EIN 900850270 · Headquarters: Moville, IA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  13. Sioux City Jewish Cemetery Association

    EIN 421381716 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  14. Sioux City Police Officers Association

    EIN 426057343 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Sioux City Public Library Foundation

    EIN 421261668 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  16. Sioux City Westside Little Lea Westside Little League

    EIN 421413422 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  17. Sioux County Historical Society

    EIN 237090007 · Headquarters: ORANGE CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Sioux County Historical Society Inc

    EIN 470573073 · Headquarters: Harrison, NE, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Sioux County Oratorio Chorus Inc

    EIN 421309262 · Headquarters: Orange City, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Sioux Empire Film Festival

    EIN 474314020 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  21. Sioux Empire Home Builders Care Foundation

    EIN 223946421 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  22. Sioux Empire Kennel Club Inc

    EIN 466015757 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  23. Sioux Empire SHRM

    EIN 363679504 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  24. Sioux Empire United Way Inc

    EIN 460233701 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  25. Sioux Falls Airshow Inc

    EIN 460404634 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  26. Sioux Falls Arts Council

    EIN 460354287 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Sioux Falls Ballooning Association

    EIN 460396889 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  28. Sioux Falls Bridge Club

    EIN 466017027 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Sioux Falls Catholic School Corporation

    EIN 460413591 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  30. Sioux Falls Childrens Choir

    EIN 813148851 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  31. Sioux Falls Chinese School

    EIN 271328173 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  32. Sioux Falls Development Foundation Inc

    EIN 460243934 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  33. Sioux Falls Downtown Lions Club

    EIN 466011178 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  34. Sioux Falls Educational Assistants Association

    EIN 471718337 · Headquarters: Pierre, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Sioux Falls Environmental Access Inc

    EIN 460346270 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-PF

  36. Sioux Falls Firefighters Benevolent Foundation

    EIN 680589701 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Sioux Falls Greater South Dakota Alumni Chapter

    EIN 932173396 · Headquarters: Oxford, OH, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  38. Sioux Falls Junior Chamber of Commerce

    EIN 460189401 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  39. Sioux Falls Lodge No 9 - Independent Order of Odd Fellows

    EIN 465476959 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  40. Sioux Falls Mens 12-Inch Slowpitch Softball League Inc

    EIN 460361620 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  41. Sioux Falls Quilters Guild Inc

    EIN 142003445 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Sioux Falls Referral Network

    EIN 463686339 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  43. Sioux Falls Regional 600 Bowlers Club

    EIN 450778036 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  44. Sioux Falls Right to Life

    EIN 832845118 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Sioux Falls Snowmobile Club-the Sno-trackers

    EIN 460388701 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  46. Sioux Falls St Pats Extravaganza Inc

    EIN 460412307 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Sioux Falls Trades & Labor

    EIN 460189587 · Headquarters: Sioux Falls, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  48. Sioux Falls Volunteers of America G

    EIN 753093582 · Headquarters: ALEXANDRIA, VA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  49. Sioux Falls Youth Hockey Association

    EIN 460427805 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Sioux Golf & Country Club

    EIN 420671782 · Headquarters: ALTON, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  51. Sioux Hunting Club Inc C O Gary Wood

    EIN 510243899 · Headquarters: Beach Lake, PA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Sioux Rapids Teachers Association

    EIN 237099813 · Headquarters: Sioux Rapids, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  53. Sioux River Rodeo Club

    EIN 364072084 · Headquarters: Flandreau, SD, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-PF

  54. Sioux Roundup Inc

    EIN 460444478 · Headquarters: SIOUX FALLS, SD, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  55. Sioux Rural Water System Inc

    EIN 460319686 · Headquarters: Watertown, SD, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  56. Sioux Steel Company Foundation

    EIN 466012618 · Headquarters: SIOUX FALLS, SD, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  57. Sioux Tribe 128 Improved Order of Redmen

    EIN 311236030 · Headquarters: Columbus, OH, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  58. Sioux Valley Chapter of the American Orff- Schulwerk

    EIN 421281480 · Headquarters: Spencer, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Sioux Valley Energy

    EIN 460189704 · Headquarters: Pipestone, MN, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  60. Sioux Valley Genealogical Society

    EIN 460356408 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Sioux Wheelers Inc

    EIN 460366809 · Headquarters: Dell Rapids, SD, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  62. Siouxland Chamber Foundation

    EIN 421074273 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. Siouxland Chamber of Commerce

    EIN 421229237 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  64. Siouxland Chapter of the Risk Management Association

    EIN 814389124 · Headquarters: Sioux Falls, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  65. Siouxland Chapter Piano Technicians Guild 511

    EIN 270428379 · Headquarters: Sioux City, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Siouxland Civic Dance Association

    EIN 421231496 · Headquarters: MCCOOK LAKE, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  67. Siouxland Community Soup Kitchen

    EIN 421290504 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  68. Siouxland Construction Alliance

    EIN 420503240 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  69. Siouxland Critical Incident Stress Management Team

    EIN 320826158 · Headquarters: Cherokee, IA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Siouxland Economic Development Corporation

    EIN 421150060 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  71. Siouxland Habitat for Humanity

    EIN 421388519 · Headquarters: Sioux City, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  72. Siouxland Historical Railroad Assoc

    EIN 421230863 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  73. Siouxland Hog Chapter Inc

    EIN 900178102 · Headquarters: SIOUX CITY, IA, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  74. Siouxland Huskers

    EIN 452671978 · Headquarters: Lawton, IA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  75. Siouxland Paramedics Inc

    EIN 421185707 · Headquarters: Sioux City, IA, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  76. Siouxland Safety Company

    EIN 384050802 · Headquarters: SIOUX CITY, IA, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Siouxland Sharks Swimming Club Inc

    EIN 812309178 · Headquarters: SIOUX CITY, IA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  78. Siouxland Shooters

    EIN 800857017 · Headquarters: Moville, IA, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  79. Siouxland Sports and Cultural Events Congress

    EIN 421387591 · Headquarters: Sioux City, IA, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  80. Siouxland Swine

    EIN 272525082 · Headquarters: Dakota City, NE, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  81. Siouxland Youth Chorus Inc

    EIN 421362896 · Headquarters: Sioux City, IA, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  82. Siouxland Youth Shooters Organization

    EIN 223888172 · Headquarters: Renner, SD, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  83. Sip Study Knit

    EIN 473513377 · Headquarters: West Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  84. Sipag-ny Corp

    EIN 472090745 · Headquarters: Staten Island, NY, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Sipe Ministries Inc

    EIN 710508229 · Headquarters: LITTLE ROCK, AR, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  86. Sipe Springs Cemetery Association

    EIN 751945279 · Headquarters: Comanche, TX, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Sipe Viola Charitable Tuw

    EIN 566413546 · Headquarters: SAINT LOUIS, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  88. Sipes Bedford W Memorial Fund

    EIN 746321954 · Headquarters: SAINT LOUIS, MO, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  89. SIPES Foundation

    EIN 751836869 · Headquarters: Richardson, TX, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  90. Siphon Hill Water Association Inc

    EIN 271546243 · Headquarters: Rapid City, SD, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Sipler J Wesley Uw

    EIN 236224326 · Headquarters: PITTSBURGH, PA, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  92. Sippican Choral Society

    EIN 222530352 · Headquarters: Marion, MA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  93. Sippican Historical Society

    EIN 046125635 · Headquarters: Marion, MA, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  94. Sippican Rod and Gun Club Inc

    EIN 042493724 · Headquarters: ROCHESTER, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  95. Sippican Tennis Club

    EIN 042189006 · Headquarters: Marion, MA, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  96. Sips & Kicks Foundation

    EIN 813480073 · Headquarters: Tenafly, NJ, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  97. Sipsey Hunting Club

    EIN 881504397 · Headquarters: HUNTSVILLE, AL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  98. Sipsey Valley Fire Department

    EIN 630885002 · Headquarters: BUHL, AL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  99. Sir Earl Toon Foundation

    EIN 884331427 · Headquarters: DALLAS, TX, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  100. Sir Herbert Read Consortium

    EIN 917900952 · Headquarters: Seattle, WA, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

First page and all pages