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. Sigma Delta Tau-alpha Upsilon

    EIN 370819623 · Headquarters: PEORIA, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  2. Sigma Gamma Epsilon

    EIN 742239787 · Headquarters: Macomb, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  3. Sigma Gamma Rho Sorority

    EIN 333406917 · Headquarters: MACOMB, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  4. Sigma Gamma Rho Sorority

    EIN 471333179 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  5. Sigma Gamma Rho Sorority

    EIN 842141436 · Headquarters: MACOMB, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  6. Sigma Gamma Rho Sorority

    EIN 991876212 · Headquarters: CASEYVILLE, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  7. Sigma Gamma Rho Sorority Inc

    EIN 061796371 · Headquarters: NORMAL, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  8. Sigma Gamma Rho Sorority Inc

    EIN 201539950 · Headquarters: BOLINGBROOK, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  9. Sigma Gamma Rho Sorority Inc

    EIN 205905404 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  10. Sigma Gamma Rho Sorority Inc

    EIN 260249551 · Headquarters: ROCKFORD, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  11. Sigma Gamma Rho Sorority Inc

    EIN 311321654 · Headquarters: SPRINGFIELD, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  12. Sigma Gamma Rho Sorority Inc

    EIN 363559242 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  13. Sigma Gamma Rho Sorority Inc

    EIN 364088353 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  14. Sigma Gamma Rho Sorority Inc

    EIN 364162754 · Headquarters: OAK LAWN, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  15. Sigma Gamma Rho Sorority Inc

    EIN 364776110 · Headquarters: HOMEWOOD, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  16. Sigma Gamma Rho Sorority Inc

    EIN 366164909 · Headquarters: MARKHAM, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  17. Sigma Gamma Rho Sorority Inc

    EIN 371105114 · Headquarters: NORMAL, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  18. Sigma Gamma Rho Sorority Inc

    EIN 371105116 · Headquarters: PEORIA, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  19. Sigma Gamma Rho Sorority Inc

    EIN 371263948 · Headquarters: PEORIA, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  20. Sigma Gamma Rho Sorority Inc

    EIN 371347855 · Headquarters: URBANA, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  21. Sigma Gamma Rho Sorority Inc

    EIN 376034704 · Headquarters: EAST ST LOUIS, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  22. Sigma Gamma Rho Sorority Inc

    EIN 376076065 · Headquarters: Glen Carbon, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  23. Sigma Gamma Rho Sorority Inc

    EIN 510230479 · Headquarters: CHAMPAIGN, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  24. Sigma Gamma Rho Sorority Inc

    EIN 800963283 · Headquarters: NORMAL, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  25. Sigma Gamma Rho Sorority Inc

    EIN 900743561 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  26. Sigma Gamma Rho Sorority Inc

    EIN 911868492 · Headquarters: EVANSTON, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  27. Sigma Gamma Rho Sorority Inc

    EIN 911956827 · Headquarters: CHICAGO, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  28. Sigma Gamma Rho Sorority Inc

    EIN 912046194 · Headquarters: BOLINGBROOK, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  29. Sigma Gamma Rho Sorority Inc Central Region

    EIN 411796347 · Headquarters: ROMEOVILLE, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  30. Sigma Gamma Rho Sorority Inc Xi Theta Sigma

    EIN 993999504 · Headquarters: SWANSEA, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  31. Sigma Gamma Rho Sorority Inc-Mu Kappa Sigma Alumnae Chapter

    EIN 814714569 · Headquarters: Waukegan, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  32. Sigma Gamma Rho-gamma Rho Chapter

    EIN 263377568 · Headquarters: Peoria, IL, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  33. Sigma Kappa Inc Eta

    EIN 376035131 · Headquarters: BLOOMINGTON, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  34. Sigma Nu Fraternity

    EIN 205899009 · Headquarters: Dekalb, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  35. Sigma Nu Fraternity

    EIN 237327724 · Headquarters: Peoria, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  36. Sigma Nu Fraternity

    EIN 371283515 · Headquarters: Charleston, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. Sigma Nu Fraternity

    EIN 811870867 · Headquarters: Normal, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  38. Sigma Omicron House Corporation of Kappa Delta Sorority a Virginia Corporation

    EIN 366101386 · Headquarters: CHAMPAIGN, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  39. Sigma Phi Alpha Dental Hygiene Honor

    EIN 900061984 · Headquarters: Rockford, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  40. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 363022027 · Headquarters: PALATINE, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  41. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 364032438 · Headquarters: Chicago Heights, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  42. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 371276805 · Headquarters: Mattoon, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  43. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 371714710 · Headquarters: Champaign, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  44. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 861077572 · Headquarters: Carbondale, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  45. Sigma Phi Delta

    EIN 370661730 · Headquarters: Champaign, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  46. Sigma Phi Epsilon

    EIN 881017483 · Headquarters: Crystal Lake, IL, US · Unknown & Unclassified · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  47. Sigma Phi Epsilon Fraternity Inc

    EIN 362849706 · Headquarters: Elk Grove Village, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  48. Sigma Phi Epsilon Fraternity Inc

    EIN 370516318 · Headquarters: ELMHURST, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  49. Sigma Phi Epsilon Fraternity Inc

    EIN 376048307 · Headquarters: Peoria, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  50. Sigma Phi Epsilon Illinois Lambda Chapter

    EIN 462549905 · Headquarters: Evanston, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  51. Sigma Phi Gamma International Sorority Inc

    EIN 366108479 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  52. Sigma Phi Gamma International Sorority Inc

    EIN 376043585 · Headquarters: Canton, IL, US · Unknown & Unclassified · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  53. Sigma Pi

    EIN 510605475 · Headquarters: Dekalb, IL, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  54. Sigma Pi Fraternity International

    EIN 376063835 · Headquarters: CARBONDALE, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  55. Sigma Pi Fraternity-intl Beta Gamma Chp

    EIN 376063836 · Headquarters: SPRINGFIELD, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  56. Sigma Rho Epsilon

    EIN 371299614 · Headquarters: Charleston, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  57. Sigma Sigma Phi

    EIN 366110024 · Headquarters: Downers Grove, IL, US · Unknown & Unclassified · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  58. Sigma Sigma Sigma Bldg Corp of DeKalb

    EIN 362500819 · Headquarters: DeKalb, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  59. Sigma Sigma Sigma Inc

    EIN 370698327 · Headquarters: MACOMB, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  60. Sigma Sigma Sigma Inc

    EIN 453789941 · Headquarters: Palatine, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  61. Sigma Sigma Sigma Inc

    EIN 454637969 · Headquarters: Vernon Hills, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Sigma Sigma Sigma Inc

    EIN 464955974 · Headquarters: Belvidere, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  63. Sigma Tau Delta Society Inc

    EIN 363397304 · Headquarters: DEKALB, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  64. Sigma Theta Tai Inc

    EIN 366207433 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  65. Sigma Theta Tau Inc

    EIN 311042677 · Headquarters: Romeoville, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  66. Sigma Theta Tau Inc

    EIN 311043306 · Headquarters: Elmhurst, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  67. Sigma Theta Tau Inc

    EIN 362909990 · Headquarters: DeKalb, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  68. Sigma Theta Tau Inc

    EIN 366206051 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  69. Sigma Theta Tau Inc

    EIN 510232373 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  70. Sigma Theta Tau International

    EIN 900861732 · Headquarters: Peoria, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  71. Sigma Theta Tau International Inc

    EIN 311042717 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  72. Sigma Theta Tau International Inc

    EIN 311246731 · Headquarters: Bourbonnais, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  73. Sigma Theta Tau International Inc

    EIN 311309936 · Headquarters: University Park, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  74. Sigma Theta Tau International Inc

    EIN 311309944 · Headquarters: Aurora, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  75. Sigma Theta Tau International Inc

    EIN 351988128 · Headquarters: Normal, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  76. Sigma Theta Tau International Inc

    EIN 366159633 · Headquarters: Maywood, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  77. Sigma Theta Tau International Inc

    EIN 621092241 · Headquarters: Edwardsville, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  78. Sigma Theta Tau International Inc

    EIN 912039503 · Headquarters: Quincy, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  79. Sigma Xi Club of Rockford

    EIN 362935508 · Headquarters: Rockford, IL, US · Unknown & Unclassified · Latest available filing year: 2008 · Primary form: IRS Form 990-N

  80. Sigma Xi Southern Illinois Chapter

    EIN 800405921 · Headquarters: Carbondale, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  81. Sign Display Pictorial Artists and Allied Workers Local Union #830

    EIN 360843835 · Headquarters: MOKENA, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  82. Silas & Ruth Claypool Foundation

    EIN 376288069 · Headquarters: ROBINSON, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  83. Silohe Evangelical Church Inc

    EIN 363266992 · Headquarters: Chicago, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990

  84. Silver Creek Museum

    EIN 363621924 · Headquarters: Freeport, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  85. Silver Cross Foundation

    EIN 363185350 · Headquarters: New Lenox, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990

  86. Silver Horace P Tw Et Al Xxxxx6009

    EIN 136034170 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  87. Silver Lining Solutions 4U Inc

    EIN 933534161 · Headquarters: Hazel Crest, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  88. Silverman Fam Foundation Trust

    EIN 396577946 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  89. Silvis Lions Club

    EIN 861784917 · Headquarters: SILVIS, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Silvis Little League

    EIN 920794446 · Headquarters: Silvis, IL, USA · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  91. Siman Family Charities

    EIN 455265366 · Headquarters: Antioch, IL, US · Unknown & Unclassified · Latest available filing year: 2020 · Primary form: IRS Form 990-N

  92. Simater Endowment Trust

    EIN 846965231 · Headquarters: EAST PEORIA, IL, USA · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-PF

  93. Simbang Gabi Eastern Cluster Foundation Inc

    EIN 271431825 · Headquarters: Downers Grove, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  94. Simpkin Brown Cemetery Association

    EIN 922275707 · Headquarters: Griggsville, IL, US · Unknown & Unclassified · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Sinai Chicago

    EIN 363305449 · Headquarters: Chicago, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990

  96. Singing Boys Of Rockford

    EIN 362603214 · Headquarters: Rockford, IL, US · Unknown & Unclassified · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  97. Singing for Seniors

    EIN 452393937 · Headquarters: Naperville, IL, US · Unknown & Unclassified · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  98. Sinnissippi Audubon Society

    EIN 611597198 · Headquarters: Rockford, IL, US · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  99. Sip Study Knit

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

  100. Sirius Fund

    EIN 363712587 · Headquarters: CHICAGO, IL, USA · Unknown & Unclassified · Latest available filing year: 2024 · Primary form: IRS Form 990-PF

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