| 1 | Illinois Department of Healthcare & Family Services · Springfield | State and local governments | 36 | $99 billion |
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| 2 | Illinois State Board of Education · Springfield | State and local governments | 159 | $20 billion |
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| 3 | Illinois Department of Transportation · Springfield | State and local governments | 7,615 | $12 billion |
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| 4 | Illinois Department of Human Service · Springfield | State and local governments | 315 | $11 billion |
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| 5 | Chicago Transit Authority · Chicago | State and local governments | 44 | $5.2 billion |
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| 6 | Illinois Department Commerce & Economic Opportunity · Springfield | State and local governments | 85 | $4.1 billion |
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| 7 | Illinois Environmental Protection Agency · Springfield | State and local governments | 124 | $2.9 billion |
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| 8 | Illinois Emergency Management Agency and Office of Homeland Security · Springfield | State and local governments | 69 | $2.8 billion |
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| 9 | University of Illinois · Urbana | Colleges and universities | 2,162 | $2.2 billion |
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| 10 | Northwestern University · Evanston | Colleges and universities | 1,558 | $2.1 billion |
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| 11 | Northeast Illinois Railroad Co · Chicago | State and local governments | 25 | $2.1 billion |
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| 12 | Department of Public Health Illinois · Springfield | State and local governments | 141 | $2.0 billion |
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| 13 | The University of Chicago · Chicago | Colleges and universities | 1,697 | $1.9 billion |
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| 14 | Department of Children & Family Service · Springfield | State and local governments | 76 | $1.7 billion |
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| 15 | University of Illinois · Chicago | Colleges and universities | 1,313 | $1.4 billion |
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| 16 | Illinois Department of Employment Security · Chicago | State and local governments | 60 | $1.3 billion |
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| 17 | Chicago Housing Authority · Chicago | State and local governments | 30 | $1.2 billion |
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| 18 | City of Chicago · Springfield | State and local governments | 37 | $854 million |
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| 19 | Chicago Department of Public Health · Chicago | State and local governments | 66 | $792 million |
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| 20 | Northwestern University · Evanston | Colleges and universities | 966 | $754 million |
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| 21 | City of Chicago · Chicago | State and local governments | 31 | $734 million |
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| 22 | Department of Natural Resources Illinois · Springfield | State and local governments | 385 | $657 million |
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| 23 | Century Aluminum Co · Chicago | Businesses | 1 | $500 million |
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| 24 | Pace, the Suburban Bus Division of the Regional Transportation Authority · Arlington Heights | Other | 20 | $459 million |
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| 25 | Chicago Department of Transportation · Chicago | State and local governments | 7 | $424 million |
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| 26 | Illinois Department on Aging · Springfield | State and local governments | 103 | $421 million |
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| 27 | Illinois Department of Veterans' Affairs · Springfield | State and local governments | 10 | $392 million |
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| 28 | Rush University Medical Center · Chicago | Nonprofits | 226 | $377 million |
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| 29 | Chicago, City of · Chicago | State and local governments | 11 | $346 million |
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| 30 | Heartland Human Care Services, Inc. · Chicago | Nonprofits | 45 | $298 million |
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| 31 | Illinois Criminal Justice Information Authority · Chicago | State and local governments | 45 | $289 million |
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| 32 | Illinois Department of Military Affairs · Springfield | State and local governments | 78 | $279 million |
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| 33 | Institute of Gas Technology · Des Plaines | Nonprofits | 12 | $273 million |
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| 34 | Illinois Housing Development Authority · Chicago | State and local governments | 15 | $255 million |
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| 35 | Ann & Robert H Lurie Childrens Hospital of Chicago · Chicago | Nonprofits | 151 | $243 million |
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| 36 | Start Early · Chicago | Nonprofits | 5 | $223 million |
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| 37 | Springfield, City of · Springfield | State and local governments | 18 | $215 million |
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| 38 | Illinois Finance Authority · Chicago | State and local governments | 2 | $181 million |
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| 39 | State of Illinois · Springfield | State and local governments | 2 | $168 million |
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| 40 | Archer-Daniels-Midland Company · Decatur | Businesses | 9 | $160 million |
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| 41 | Easter Seals Metropolitan Chicago, Inc. · Chicago | Nonprofits | 4 | $152 million |
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| 42 | Illinois Institute of Technology · Chicago | Colleges and universities | 177 | $144 million |
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| 43 | Chicago Commons Association · Chicago | Nonprofits | 5 | $142 million |
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| 44 | Board of Trustees of Southern Illinois University · Edwardsville | Colleges and universities | 55 | $136 million |
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| 45 | Northern Illinois University · Dekalb | Colleges and universities | 144 | $135 million |
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| 46 | National Opinion Research Center · Chicago | Nonprofits | 80 | $132 million |
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| 47 | Cook County · Chicago | State and local governments | 18 | $131 million |
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| 48 | Access Community Health Network · Chicago | Nonprofits | 15 | $127 million |
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| 49 | IL Community College Board · Springfield | State and local governments | 8 | $122 million |
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| 50 | American Academy of Pediatrics · Itasca | Nonprofits | 35 | $118 million |
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| 51 | Anovion LLC · Chicago | Small businesses | 1 | $117 million |
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| 52 | City of Chicago · Chicago | State and local governments | 22 | $116 million |
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| 53 | Carole Robertson Center for Learning · Chicago | Nonprofits | 4 | $116 million |
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| 54 | Loyola University of Chicago · Maywood | Colleges and universities | 129 | $114 million |
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| 55 | Southern Illinois Healthcare Foundation, Inc. · East Saint Louis | Nonprofits | 11 | $108 million |
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| 56 | Institute of Gas Technology · Des Plaines | Nonprofits | 26 | $107 million |
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| 57 | Metropolitan Family Services · Chicago | Nonprofits | 26 | $106 million |
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| 58 | Easter Seals, Inc. · Chicago | Nonprofits | 12 | $103 million |
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| 59 | Mascoutah Community Unit School District · Mascoutah | State and local governments | 9 | $100 million |
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| 60 | Board of Education City of Chicago · Chicago | State and local governments | 48 | $100 million |
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| 61 | Board of Trustees of Illinois State University · Normal | Colleges and universities | 71 | $99.6 million |
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| 62 | Maryville Academy · Des Plaines | Nonprofits | 10 | $96.5 million |
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| 63 | Board of Trustees of Southern Illinois University · Carbondale | Colleges and universities | 119 | $96.1 million |
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| 64 | Champaign-Urbana Mass Transit District · Urbana | State and local governments | 13 | $94.0 million |
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| 65 | North Chicago Community Unit School District 187 · North Chicago | State and local governments | 12 | $90.3 million |
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| 66 | Depaul University · Chicago | Colleges and universities | 43 | $90.1 million |
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| 67 | Housing Authority of the City of East St Louis · East Saint Louis | State and local governments | 92 | $85.8 million |
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| 68 | Aunt Martha's Health & Wellness Inc · Olympia Fields | Nonprofits | 14 | $84.8 million |
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| 69 | Rockford Housing Authority · Rockford | State and local governments | 82 | $81.0 million |
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| 70 | Loyola University of Chicago · Chicago | Colleges and universities | 85 | $78.8 million |
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| 71 | Rehabilitation Institute of Chicago · Chicago | Nonprofits | 62 | $78.3 million |
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| 72 | Metropolitan Airport Authority of Peoria · Peoria | State and local governments | 14 | $77.5 million |
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| 73 | Chestnut Health Systems Inc · Bloomington | Nonprofits | 77 | $76.0 million |
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| 74 | Erie Family Health Center · Chicago | Nonprofits | 16 | $74.4 million |
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| 75 | Saint Clair County Intergovernmental Grants Department · Belleville | State and local governments | 63 | $73.7 million |
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| 76 | Northeastern Illinois University · Chicago | Colleges and universities | 49 | $73.1 million |
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| 77 | Henry Booth House · Chicago | Nonprofits | 2 | $69.2 million |
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| 78 | City of Decatur · Decatur | State and local governments | 32 | $68.4 million |
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| 79 | Lawndale Christian Health Center · Chicago | Nonprofits | 14 | $67.8 million |
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| 80 | Riverbend Head Start & Fam Services · Alton | Nonprofits | 3 | $66.3 million |
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| 81 | Commonwealth Edison Co · Chicago | Businesses | 2 | $64.6 million |
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| 82 | The Thresholds · Chicago | Nonprofits | 69 | $62.4 million |
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| 83 | Community College District 502 · Glen Ellyn | Colleges and universities | 14 | $60.0 million |
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| 84 | Nanograf Corporation · Chicago | Businesses | 1 | $60.0 million |
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| 85 | All Chicago Making Homelessness History · Chicago | State and local governments | 36 | $59.0 million |
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| 86 | Children's Home & Aid Society of Illinois · Chicago | Nonprofits | 14 | $58.3 million |
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| 87 | Greater Peoria Mass Transit District · Peoria | State and local governments | 10 | $57.2 million |
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| 88 | Switched Source Inc. · Chicago | Businesses | 3 | $56.5 million |
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| 89 | Vna Health Care, an Illinois Not-for-Profit Corporation · Aurora | Nonprofits | 8 | $55.3 million |
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| 90 | Greater Rockford Airport Authority · Rockford | State and local governments | 14 | $54.1 million |
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| 91 | Champaign County · Champaign | Nonprofits | 6 | $53.4 million |
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| 92 | Catholic Charities of the Diocese of Joliet, Inc · Crest Hill | Nonprofits | 46 | $53.1 million |
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| 93 | The Near North Health Service Corporation · Chicago | Other | 10 | $52.9 million |
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| 94 | Illinois Central College · East Peoria | Colleges and universities | 16 | $52.5 million |
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| 95 | Illinois Department of Agriculture · Springfield | State and local governments | 57 | $51.5 million |
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| 96 | PCC Community Wellness Center · Oak Park | Other | 5 | $50.5 million |
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| 97 | Alliance NCTN Foundation · Chicago | Nonprofits | 1 | $50.2 million |
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| 98 | County of Dupage · Wheaton | State and local governments | 42 | $50.0 million |
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| 99 | Moraine Valley Community College · Palos Hills | State and local governments | 16 | $49.9 million |
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| 100 | Action for Healthy Kids, Inc. · Chicago | Nonprofits | 3 | $49.7 million |
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