Nonprofits in Illinois

Nonprofits in Illinois. Browse 87,324 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 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

  2. Sigma Gamma Rho Sorority Inc Zeta Mu Chapter

    EIN 352337054 · Headquarters: BOLINGBROOK, IL, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  3. 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

  4. 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

  5. Sigma Impact Foundation Nfp

    EIN 922130816 · Headquarters: Chicago, IL, US · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-N

  6. Sigma Kappa Inc Eta

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

  7. Sigma Kappa Sorority Beta Nu House Corporation

    EIN 510241564 · Headquarters: PEORIA, IL, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990

  8. Sigma Nu Fraternity

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

  9. Sigma Nu Fraternity

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

  10. Sigma Nu Fraternity

    EIN 260422360 · Headquarters: Urbana, IL, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  11. Sigma Nu Fraternity

    EIN 370516315 · Headquarters: Urbana, IL, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  12. Sigma Nu Fraternity

    EIN 371189287 · Headquarters: Charleston, IL, US · Education · Latest available filing year: 2017 · Primary form: IRS Form 990-N

  13. Sigma Nu Fraternity

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

  14. Sigma Nu Fraternity

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

  15. Sigma Nu Fraternity Delta Theta Chapter

    EIN 462903607 · Headquarters: GALESBURG, IL, USA · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-EZ

  16. Sigma Nu of Southeast Missouri Inc

    EIN 431809569 · Headquarters: FAIRVIEW HEIGHTS, IL, USA · Education · Latest available filing year: 2023 · Primary form: IRS Form 990

  17. Sigma Omega Chapter

    EIN 461177971 · Headquarters: Chicago, IL, USA · Education · Latest available filing year: 2023 · Primary form: IRS Form 990-EZ

  18. 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

  19. 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

  20. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 341997044 · Headquarters: Chicago, IL, US · Education · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  21. 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

  22. 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

  23. 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

  24. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 371276811 · Headquarters: Peoria, IL, US · Education · Latest available filing year: 2007 · Primary form: IRS Form 990-N

  25. 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

  26. Sigma Phi Alpha Dental Hygiene Honor Society

    EIN 611483432 · Headquarters: Godfrey, IL, US · Arts, Culture & Humanities · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  27. 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

  28. Sigma Phi Delta

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

  29. Sigma Phi Epsilon

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

  30. Sigma Phi Epsilon Fraternity House Association

    EIN 237373494 · Headquarters: Peoria, IL, USA · Mutual & Membership Benefit · Latest available filing year: 2020 · Primary form: IRS Form 990-EZ

  31. Sigma Phi Epsilon Fraternity Inc

    EIN 237261578 · Headquarters: Normal, IL, USA · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-EZ

  32. 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

  33. Sigma Phi Epsilon Fraternity Inc

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

  34. Sigma Phi Epsilon Fraternity Inc

    EIN 370716021 · Headquarters: Monmouth, IL, US · Education · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  35. Sigma Phi Epsilon Fraternity Inc

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

  36. Sigma Phi Epsilon Il Eta

    EIN 237219045 · Headquarters: Edwardsville, IL, US · Education · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  37. 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

  38. 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

  39. Sigma Phi Gamma International Sorority Inc

    EIN 366131105 · Headquarters: Moline, IL, US · Education · Latest available filing year: 2009 · Primary form: IRS Form 990-N

  40. 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

  41. Sigma Pi

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

  42. Sigma Pi Fraternity International

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

  43. Sigma Pi Fraternity International Inc

    EIN 237043756 · Headquarters: Chicago, IL, US · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  44. Sigma Pi Fraternity International Inc

    EIN 311207354 · Headquarters: Bloomington, IL, US · Education · Latest available filing year: 2011 · Primary form: IRS Form 990-N

  45. Sigma Pi Fraternity International Inc

    EIN 311207355 · Headquarters: Macomb, IL, US · Education · Latest available filing year: 2015 · Primary form: IRS Form 990-N

  46. Sigma Pi Fraternity International Inc

    EIN 370672655 · Headquarters: Urbana, IL, US · Education · Latest available filing year: 2014 · Primary form: IRS Form 990-N

  47. Sigma Pi Fraternity International Inc

    EIN 371177275 · Headquarters: Edwardsville, IL, US · Education · Latest available filing year: 2016 · Primary form: IRS Form 990-N

  48. 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

  49. Sigma Pi Society of Illinois College Charitable Trust

    EIN 376283461 · Headquarters: Jacksonville, IL, USA · Education · Latest available filing year: 2025 · Primary form: IRS Form 990

  50. Sigma Rho Alumni Association

    EIN 994904507 · Headquarters: LAKE FOREST, IL, US · Recreation & Sports · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  51. Sigma Rho Epsilon

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

  52. Sigma Sigma Phi

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

  53. 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

  54. Sigma Sigma Sigma Inc

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

  55. Sigma Sigma Sigma Inc

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

  56. Sigma Sigma Sigma Inc

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

  57. Sigma Sigma Sigma Inc

    EIN 455469852 · Headquarters: Naperville, IL, US · Education · Latest available filing year: 2018 · Primary form: IRS Form 990-N

  58. Sigma Sigma Sigma Inc

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

  59. Sigma Sigma Sigma Inc

    EIN 900984834 · Headquarters: Peoria, IL, US · Education · Latest available filing year: 2013 · Primary form: IRS Form 990-N

  60. Sigma Tau Delta Society Inc

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

  61. Sigma Tau Delta USA Foundation Incorporated

    EIN 821166373 · Headquarters: Jerseyville, IL, US · Health Care · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  62. Sigma Tau Gamma Fraternity D/b/a Alpha Chi Chapter

    EIN 370703853 · Headquarters: CHAMPAIGN, IL, US · Education · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  63. Sigma Tau Gamma Fraternity Zeta Nu Chapter

    EIN 810884366 · Headquarters: Belleville, IL, US · Education · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  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 364974493 · Headquarters: Danville, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  71. Sigma Theta Tau International

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

  72. Sigma Theta Tau International

    EIN 901112547 · Headquarters: Macomb, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  73. Sigma Theta Tau International

    EIN 901112549 · Headquarters: Rock Island, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  74. Sigma Theta Tau International Inc

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

  75. Sigma Theta Tau International Inc

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

  76. 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

  77. Sigma Theta Tau International Inc

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

  78. Sigma Theta Tau International Inc

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

  79. Sigma Theta Tau International Inc

    EIN 363950293 · Headquarters: Springfield, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  80. Sigma Theta Tau International Inc

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

  81. Sigma Theta Tau International Inc

    EIN 621092065 · Headquarters: Peoria, IL, USA · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-EZ

  82. Sigma Theta Tau International Inc

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

  83. Sigma Theta Tau International Inc

    EIN 900266170 · Headquarters: Peoria, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  84. Sigma Theta Tau International Inc

    EIN 900299267 · Headquarters: Joliet, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  85. Sigma Theta Tau International Inc

    EIN 900738355 · Headquarters: Rockford, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  86. Sigma Theta Tau International Inc

    EIN 901135163 · Headquarters: Lebanon, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  87. Sigma Theta Tau International Inc

    EIN 901141590 · Headquarters: Chicago, IL, US · Education · Latest available filing year: 2021 · Primary form: IRS Form 990-N

  88. Sigma Theta Tau International Inc

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

  89. Sigma Theta Tau-theta Pi Chaper

    EIN 371205586 · Headquarters: Bloomington, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

  90. Sigma Xi Chapter 22 Northwestern University

    EIN 362892239 · Headquarters: Evanston, IL, US · Science & Technology · Latest available filing year: 2019 · Primary form: IRS Form 990-N

  91. Sigma Xi Club of Rockford

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

  92. Sigma Xi Southern Illinois Chapter

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

  93. 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

  94. Sign of the Kingdom

    EIN 371351897 · Headquarters: Sumner, IL, US · Philanthropy, Voluntarism & Grantmaking Foundations · Latest available filing year: 2025 · Primary form: IRS Form 990-N

  95. Sign of the Kingdom - East

    EIN 371279695 · Headquarters: LAWRENCEVILLE, IL, USA · Human Services · Latest available filing year: 2025 · Primary form: IRS Form 990-EZ

  96. Signal Ensemble Theatre

    EIN 061756149 · Headquarters: CHICAGO, IL, USA · Arts, Culture & Humanities · Latest available filing year: 2015 · Primary form: IRS Form 990-EZ

  97. Signal Hill Educational Foundation

    EIN 371271146 · Headquarters: BELLEVILLE, IL, USA · Arts, Culture & Humanities · Latest available filing year: 2024 · Primary form: IRS Form 990

  98. Signal Hill Fire Protection Association Inc

    EIN 376031781 · Headquarters: BELLEVILLE, IL, USA · Public Safety, Disaster Preparedness & Relief · Latest available filing year: 2025 · Primary form: IRS Form 990

  99. Signal Hill Projects

    EIN 332643210 · Headquarters: Chicago, IL, USA · Arts, Culture & Humanities · Latest available filing year: 2025 · Primary form: IRS Form 990

  100. Signal Hill School - Pto

    EIN 264184623 · Headquarters: BELLEVILLE, IL, US · Education · Latest available filing year: 2024 · Primary form: IRS Form 990-N

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