Unknown & Unclassified nonprofits in Illinois

Unknown & Unclassified nonprofits in Illinois. Browse 25,013 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. Oak Park Arts District Business Assoc

    EIN 208203107 · Headquarters: OAK PARK, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  2. Oak Park Athletic Club

    EIN 992258227 · Headquarters: Oak Park, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. Oak Park Concert Chorale Inc

    EIN 363137689 · Headquarters: Oak Park, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  4. Oak Park Country Club

    EIN 361569160 · Headquarters: RIVER GROVE, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Oak Park Economic Development Corp

    EIN 362788088 · Headquarters: OAK PARK, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  6. Oak Park Education Foundation

    EIN 363488162 · Headquarters: OAK PARK, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  7. Oak Park Festival Theatre

    EIN 362868677 · Headquarters: Oak Park, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Oak Park Fire Fighters Association

    EIN 237303721 · Headquarters: OAK PARK, IL, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990

  9. Oak Park Homebrewers

    EIN 394458349 · Headquarters: Oak Park, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Oak Park Recorder School Inc

    EIN 362961725 · Headquarters: RIVER FOREST, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  11. Oak Park Residence Corporation

    EIN 362666771 · Headquarters: OAK PARK, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  12. Oak Park River Forest Chamber of Commerce

    EIN 361569110 · Headquarters: Oak Park, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  13. Oak Park River Forest Community of Congregations

    EIN 362317606 · Headquarters: River Forest, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  14. Oak Park River Forest Concert Tour Assoc D/b/a Applause

    EIN 366215466 · Headquarters: OAK PARK, IL, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  15. Oak Park Society of Model Engineers

    EIN 261974433 · Headquarters: Oak Park, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  16. Oak Park Sportsmens Club

    EIN 366127570 · Headquarters: Plainfield, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  17. Oak Park Tennis Center

    EIN 361569507 · Headquarters: RIVER FOREST, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Oak Street Council

    EIN 363535812 · Headquarters: Chicago, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  19. Oak View Country Club

    EIN 361569920 · Headquarters: ALEDO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  20. Oaken Acres Wildlife Center

    EIN 363325126 · Headquarters: SYCAMORE, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  21. Oakland Area Senior Citizens

    EIN 371141226 · Headquarters: OAKLAND, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. Oakland Community Memorial Library

    EIN 237222052 · Headquarters: Oakland, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Oakland Eagle Boosters

    EIN 830574149 · Headquarters: Lake Villa, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Oakland-pontiac Worldwide

    EIN 800349228 · Headquarters: Marissa, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Oakwood Cemetery Association of LaSalle

    EIN 362005579 · Headquarters: La Salle, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  26. Oakwood Country Club

    EIN 361570825 · Headquarters: COAL VALLEY, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  27. Oakwood Water Association

    EIN 376048765 · Headquarters: east Peoria, IL, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  28. Oasis Glc

    EIN 020648940 · Headquarters: Hoffman Estates, IL, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  29. Oasis International Ltd Nfp

    EIN 364200033 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Oasis Organization of Asian Indians at Sbc National Board

    EIN 200010702 · Headquarters: Hoffman Estates, IL, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  31. Obadiah Browns Benevolent Fund

    EIN 056016302 · Headquarters: Oak Park, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  32. Objectobot Inc

    EIN 392157606 · Headquarters: Northbrook, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  33. Oblate International Pastoral Investment

    EIN 364321726 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  34. Oblate Shrines and Renewal Centers Inc

    EIN 522133730 · Headquarters: BELLEVILLE, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-T

  35. Obryan Cemetary

    EIN 371022562 · Headquarters: Sadorus, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  36. Obsessed Sports Group Inc

    EIN 852428012 · Headquarters: East Moline, IL, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  37. Obsidian Institute of Integrative Medicine

    EIN 020733517 · Headquarters: Harvey, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  38. Oc Community Outreach and Workforce Development

    EIN 923155675 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  39. Ocemi Inc

    EIN 363222707 · Headquarters: South Holland, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  40. Octavus N Hutchinson Tr Xxxxx3000

    EIN 366011987 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  41. Odd Fellow Childrens Home of Illinois

    EIN 370686579 · Headquarters: Lincoln, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  42. Odd Fellow-Rebekah Housing Inc

    EIN 371042408 · Headquarters: Lincoln, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  43. Odell Apartments Inc

    EIN 510154817 · Headquarters: Odell, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Odell Sportsman Club No 1

    EIN 376046683 · Headquarters: Odell, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Odennell Eddy Floss Post 714

    EIN 366079252 · Headquarters: FRANKFORT, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  46. Oesterreichischer Gemischter Chor the Austrian Mixed Chorus

    EIN 363049325 · Headquarters: DOWNERS GROVE, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  47. Oeu-965 Health Benefit Plan

    EIN 366121856 · Headquarters: SPRINGFIELD, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  48. Ofallon Booster Club Inc

    EIN 376176183 · Headquarters: O Fallon, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  49. Ofallon Chapter 2281 Women of the Moose

    EIN 260096193 · Headquarters: OFallon, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  50. Ofallon Chapter of the Fop

    EIN 371313909 · Headquarters: O FALLON, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  51. Ofallon Historical Society Inc

    EIN 371242974 · Headquarters: O Fallon, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  52. Ofallon Lodge 2608 Layal Order Of

    EIN 680497687 · Headquarters: OFALLON, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  53. Offin Charitable Tr Xxxxx7001

    EIN 136944122 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  54. Og Yorkville Schutzhund Club

    EIN 465520911 · Headquarters: Yorkville, IL, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  55. Ogden Pto

    EIN 823155489 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  56. Ogle County American Legion

    EIN 800907449 · Headquarters: Rockford, IL, US · Unknown & Unclassified · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  57. Ogle County Economic Development Corporation

    EIN 352814750 · Headquarters: Oregon, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  58. Ogle County Farm Bureau

    EIN 361575250 · Headquarters: Oregon, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Ogle County Historical Society

    EIN 366058105 · Headquarters: Oregon, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  60. Ogle County Pork Producers Association

    EIN 363290433 · Headquarters: Oregon, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  61. Ogle County Shrine Club

    EIN 237321373 · Headquarters: ROCKFORD, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  62. Ogle County Special Olympics

    EIN 472570667 · Headquarters: Forreston, IL, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  63. Ogle Crossings Homeowners Associati On

    EIN 270953974 · Headquarters: DAVIS JUNCTION, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  64. Ohare Kiwi Club

    EIN 202435355 · Headquarters: Winfield, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Ohio Chapter of the Appraisal Institute

    EIN 311419685 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  66. Ohio Gamma Chapter of Sigma Alpha Epsilon Fraternity

    EIN 880674899 · Headquarters: Evanston, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  67. Ohio Tau Chapter of Sigma Alpha Epsilon Fraternity

    EIN 833782624 · Headquarters: EVANSTON, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  68. Ohio Urological Society Inc

    EIN 341691517 · Headquarters: EAST DUNDEE, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  69. Ohio Windmillers

    EIN 473090232 · Headquarters: Princeton, IL, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  70. Ohs Class of 2014

    EIN 383952305 · Headquarters: okawville, IL, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  71. Okawville Agricultural Products Fair Association Inc

    EIN 376044955 · Headquarters: Addieville, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  72. Okawville Business Assn Inc

    EIN 237453026 · Headquarters: OKAWVILLE, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Okawville Community Youth Association Incorporated

    EIN 376057673 · Headquarters: Oakdale, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Okeeffe Alumni

    EIN 364804932 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  75. Oktoberfest of Belleville Illinoisinc

    EIN 371329899 · Headquarters: BELLEVILLE, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  76. Oladunni Foundation Nfp

    EIN 831378572 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Old Concord Cemetery Assc

    EIN 376050021 · Headquarters: neoga, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  78. Old Covenanter Cemetery Assn of Raccoon Township Marion County Ill

    EIN 376049885 · Headquarters: Walnut Hill, IL, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  79. Old Du Quoin Cemetery Association

    EIN 376042894 · Headquarters: DU QUOIN, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  80. Old Elm Club

    EIN 361576910 · Headquarters: HIGHLAND PARK, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  81. Old Elm Scholarship Foundation

    EIN 237399476 · Headquarters: HIGHLAND PARK, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  82. Old Enterprise Foundation

    EIN 371415792 · Headquarters: LEBANON, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  83. Old Holy Resurrection Church

    EIN 203702099 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-T

  84. Old House Society

    EIN 371104501 · Headquarters: BLOOMINGTON, IL, USA · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990

  85. Old Irving Park Association

    EIN 363252882 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Old Neighborhood Italian American Club

    EIN 363204302 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  87. Old Oak Brook Polo Club Inc

    EIN 611471079 · Headquarters: BURR RIDGE, IL, USA · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-EZ

  88. Old Orland Heritage Foundation

    EIN 363895725 · Headquarters: ORLAND PARK, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  89. Old Route 66 Roadhouse Ranch

    EIN 852227045 · Headquarters: Granite City, IL, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  90. Old Settlers Assoc of Hillsboro

    EIN 376047237 · Headquarters: HILLSBORO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  91. Old State Capitol Foundation

    EIN 371294171 · Headquarters: Springfield, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  92. Old Stonington Cemetery Assocation

    EIN 370731051 · Headquarters: Stonington, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  93. Old Timers Baseball Association of Peoria Illinois

    EIN 237367004 · Headquarters: Washington, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Old Town Merchants & Residents Assoc

    EIN 363236430 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  95. Old Town Teachers Organization

    EIN 842121948 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  96. Old Town Triangle Association

    EIN 362336401 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  97. Old Willow Club

    EIN 362430411 · Headquarters: NORTHFIELD, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  98. Older Americans of Knox Inc

    EIN 371086241 · Headquarters: Galesburg, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  99. Ole Tymers Chicago Fire Fighters and Paramedics

    EIN 383782341 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  100. Olive Branch Cemetery

    EIN 376049673 · Headquarters: Annapolis, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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