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. Oliver W Storer Scholarship Foundation

    EIN 356012044 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  2. Oliver-hoffmann Foundation

    EIN 366896078 · Headquarters: YORKVILLE, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  3. Olivia Herbert Tr Fbo St Georges Prot

    EIN 136050701 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  4. OLL Education Services

    EIN 363184208 · Headquarters: North Aurora, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  5. Olney Arts Council

    EIN 510179115 · Headquarters: OLNEY, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  6. Olney Chamber of Commerce

    EIN 370447473 · Headquarters: OLNEY, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  7. Olney Memorial Post 4226 Veterans of Foreign Wars

    EIN 370638696 · Headquarters: OLNEY, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Olney Tiger Sports Boosters Inc

    EIN 371129003 · Headquarters: Olney, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Olympia Fields Country Club

    EIN 361580550 · Headquarters: OLYMPIA FIELDS, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  10. Om Productions International

    EIN 363093847 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  11. Omaha Masonic Lodge 723

    EIN 204770175 · Headquarters: Norris City, IL, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  12. Omega Psi Phi Fraternity

    EIN 363844231 · Headquarters: Moline, IL, US · Unknown & Unclassified · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  13. Omega Psi Phi Fraternity

    EIN 461152020 · Headquarters: Hazel Crest, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  14. Omicron Alumni Association

    EIN 376051476 · Headquarters: SAVOY, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  15. Omicron Kappa Upsilon Sigma Chapter

    EIN 237156597 · Headquarters: Chicago, IL, USA · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-EZ

  16. Omicron Kappa Upsilon-honorary Dental Society

    EIN 237347887 · Headquarters: Alton, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Omni Youth Services Incorporated

    EIN 362777027 · Headquarters: BUFFALO GROVE, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  18. Omnia Institute for Contextual Leadership

    EIN 362887286 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  19. Omnibus Society of America

    EIN 366112688 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  20. Omron Foundation Inc

    EIN 363644055 · Headquarters: HOFFMAN ESTATES, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

  21. On Broadway Dancers

    EIN 363778933 · Headquarters: Coal City, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  22. On the Move 5 Fold Ministries

    EIN 922998472 · Headquarters: NORTH AURORA, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  23. On the Road Classics Car Club

    EIN 364325635 · Headquarters: ANTIOCH, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  24. Onarga Community Center

    EIN 371272830 · Headquarters: Onarga, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  25. Onarga Lions Club

    EIN 364478038 · Headquarters: Onarga, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Once You Choose Hope

    EIN 412586757 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Oncology Nursing Society - C393 East Central Illinois

    EIN 815139388 · Headquarters: Fisher, IL, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  28. One Body One Purpose

    EIN 461055759 · Headquarters: PEKIN, IL, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  29. One Future Illinois Nfp

    EIN 994447889 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. ONE Peoples Campaign

    EIN 823982666 · Headquarters: Chicago, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  31. One Plus One Momc

    EIN 363943536 · Headquarters: STREAMWOOD, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  32. One Promise Land

    EIN 463257102 · Headquarters: Country Club Hills, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  33. One Promise Land Travels

    EIN 815026949 · Headquarters: Country Club Hills, IL, US · Unknown & Unclassified · Latest available filing year: 2022 · Primary form: IRS Form 990-N

  34. One Purpose Love

    EIN 861595662 · Headquarters: Crete, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  35. One Vision Care Incorporated

    EIN 991685541 · Headquarters: West Frankfort, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. One-five Foundation

    EIN 363711199 · Headquarters: Palatine, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  37. Onechoir Global Nfp Inc

    EIN 843866811 · Headquarters: Lake In The Hills, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Oneida Cemetery Association

    EIN 370685778 · Headquarters: ALTONA, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  39. Onsite Wastewater Professionals of Il Association Ltd

    EIN 800328777 · Headquarters: Waterloo, IL, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  40. Onward Media

    EIN 376082151 · Headquarters: GOODFIELD, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  41. Onward Ministry Inc

    EIN 473699114 · Headquarters: FORREST, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  42. Onward Neighborhood House

    EIN 362167822 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  43. Onwentsia Club

    EIN 361583620 · Headquarters: LAKE FOREST, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  44. Open Arms Warm Heart Community Daycare Nfp

    EIN 800521787 · Headquarters: Hillside, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Open Door Clinic of Greater Elgin

    EIN 362899274 · Headquarters: ELGIN, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  46. Open Door Inc

    EIN 363125090 · Headquarters: SANDWICH, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  47. Open Gates of Mercy Ministry

    EIN 861916285 · Headquarters: Sandwich, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Openlands

    EIN 362649603 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Oper Plasterers & Cement Masons #11

    EIN 364078859 · Headquarters: WOODSTOCK, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  50. Operating Engineers 649 Afl Cio Death Benefit Fund Plan

    EIN 376047856 · Headquarters: Peoria, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Operating Engineers Local 318 Joint Apprenticeship & Advanced Training

    EIN 237306350 · Headquarters: MARION, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  52. Operating Engineers Local 520 a B C D

    EIN 370347803 · Headquarters: GRANITE CITY, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  53. Operating Engineers Local 520 Joint Apprenticeship and Training Fund

    EIN 370964198 · Headquarters: ST JACOB, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  54. Operating Engineers Local 520 Vacation Fund

    EIN 376149098 · Headquarters: OFALLON, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  55. Operation Blessing People That Care Inc

    EIN 371206691 · Headquarters: WOOD RIVER, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  56. Operation Christmas

    EIN 363090140 · Headquarters: Wheaton, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Operation Home with Honor Pow-mia Inc

    EIN 902100017 · Headquarters: PARK RIDGE, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  58. Operation Outing Inc

    EIN 371123841 · Headquarters: VANDALIA, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  59. Operation Spouse and Soldier Support Group

    EIN 270910377 · Headquarters: Sherman, IL, US · Unknown & Unclassified · Latest available filing year: 2012 · Primary form: IRS Form 990-N

  60. Operative Plasterers & Cement Mason International International

    EIN 363728023 · Headquarters: Woodstock, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Operative Plasterers & Cement Masons Loc

    EIN 370448243 · Headquarters: TROY, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  62. Operative Plasterers & Cement Masons Local 18

    EIN 371355734 · Headquarters: PEORIA, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  63. Operative Plasterers and Cement Masons Local #143

    EIN 370447883 · Headquarters: CHAMPAIGN, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  64. Oppenheimer&haas Xxxxx1004

    EIN 136013101 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  65. Oppo Boat & Ski Club

    EIN 366116678 · Headquarters: palos park, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  66. Opportunity Shredding

    EIN 922492873 · Headquarters: GURNEE, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  67. Opsc Lodge Corp Oak Park Ski Club Lodge Corp Inc

    EIN 362803641 · Headquarters: Buffalo Grove, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  68. Optical Society of Chicago

    EIN 821221666 · Headquarters: Des Plaines, IL, US · Unknown & Unclassified · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  69. Opticians Association of Illinois

    EIN 371224166 · Headquarters: Springfield, IL, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  70. Optimal Care Services

    EIN 922763723 · Headquarters: FLOSSMOOR, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  71. Optimist Club of Belleville Inc

    EIN 376032267 · Headquarters: BELLEVILLE, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Optimist Club of Deerfield

    EIN 363534194 · Headquarters: DEERFIELD, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  73. Optimist Club of Des Plaines

    EIN 366083729 · Headquarters: DES PLAINES, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Optimist Club of Quincy

    EIN 376051477 · Headquarters: QUINCY, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  75. Optimist International

    EIN 237010579 · Headquarters: Belleville, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  76. Optimist International

    EIN 237010599 · Headquarters: Springfield, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  77. Optimist International

    EIN 237024903 · Headquarters: Belleville, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  78. Optimist International

    EIN 362656463 · Headquarters: Princeton, IL, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  79. Optimist International

    EIN 363199926 · Headquarters: Sterling, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Optimist International

    EIN 363423147 · Headquarters: Niles, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Optimist International

    EIN 366089763 · Headquarters: East Moline, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  82. Optimist International

    EIN 366132786 · Headquarters: Glenview, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  83. Optimist International

    EIN 370727711 · Headquarters: Columbia, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  84. Optimist International

    EIN 371117569 · Headquarters: Delavan, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Optimist International

    EIN 371177843 · Headquarters: Chillicothe, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Optimist International

    EIN 371232627 · Headquarters: MILLSTADT, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  87. Optimist International

    EIN 371239646 · Headquarters: Freeburg, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  88. Optimist International

    EIN 371300983 · Headquarters: MARSHALL, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  89. Optimist International

    EIN 376049054 · Headquarters: Urnama, IL, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  90. Optimist International

    EIN 376062225 · Headquarters: Taylorville, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  91. Optimist International

    EIN 376080927 · Headquarters: Granite City, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  92. Optimist International

    EIN 510212933 · Headquarters: Oswego, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  93. Optimist International

    EIN 611428716 · Headquarters: Belleville, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  94. Optimist International St David St David Optimist Club

    EIN 376045010 · Headquarters: ST DAVID, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  95. Opus 16 Inc

    EIN 813252020 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  96. Ora T & Dessie H Lower Memorial Scholarship

    EIN 237311043 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  97. Oral Health America Americas Fund for Dental Health BK 20-04264

    EIN 362382334 · Headquarters: Chicago, IL, USA · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990

  98. Orchestra Parents Organization of Sterling Inc

    EIN 363028727 · Headquarters: Sterling, IL, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  99. Order Elks BPOE #724

    EIN 360793017 · Headquarters: Kewanee, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  100. Order of Ahepa Daughters of Penelope 423 Tree Towns

    EIN 237566414 · Headquarters: Wood Dale, IL, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

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