The 100 Largest Companies In Illinois For 2021

By Chris Kolmar - Jun. 7, 2021

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If you live in Illinois and you’re looking for a job, you have come to the right place.

Because, sure, you can google things like ‘biggest companies in Illinois’ and get a fairly long list of companies with a lot of employees, or perhaps that have the biggest names — but here, we bring you the companies with the most current employees that are actually headquartered in Illinois.

Below, we’ll give you a complete list of Illinois’s 100 largest companies, but first, here’s a look at the top 10:

  1. Walgreens (Jobs)

  2. McDonald’s (Jobs)

  3. Boeing (Jobs)

  4. Caterpillar (Jobs)

  5. Abbott Laboratories (Jobs)

  6. United Airlines (Jobs)

  7. Sears Holdings (Jobs)

  8. Harrisburg Medical Center (Jobs)

  9. Mondelez International (Jobs)

  10. Veolia Environmental Services North America (Jobs)

Walgreens comes in at the top, with more current employees than any other company in the state. We’ll get to specifics in a moment; first, here’s a look at our methodology.

How we identified the biggest companies in Illinois

Here at Zippia we have developed a database of over 250,000 companies that spans the entire country.

For this report, we looked at the companies headquartered in Illinois with at least 100 employees. That left us with 1,602 companies.

We then ranked each company from most to least current employees to determine the biggest companies in Illinois.

As it turns out, Walgreens looks to the be the biggest company in Illinois clocking in with 253,400 employees.

Now, check out how the 100 biggest companies in Illinois ranked.

Detailed List Of The 100 Biggest Companies In Illinois

Rank Company City Employees Jobs
1 Walgreens Deerfield 253,400 Jobs
2 McDonald’s Oak Brook 210,000 Jobs
3 Boeing Chicago 153,027 Jobs
4 Caterpillar Peoria 101,500 Jobs
5 Abbott Laboratories North Chicago 99,000 Jobs
6 United Airlines Chicago 93,000 Jobs
7 Sears Holdings Hoffman Estates 89,000 Jobs
8 Harrisburg Medical Center Harrisburg 85,000 Jobs
9 Mondelez International Deerfield 83,000 Jobs
10 Veolia Environmental Services North America Chicago 77,864 Jobs
11 JLL Chicago 77,300 Jobs
12 State Farm Bloomington 65,664 Jobs
13 John Deere Moline 60,476 Jobs
14 Grant Thornton Chicago 53,000 Jobs
15 Upp Technology Hinsdale 50,000 Jobs
16 Aon Chicago 50,000 Jobs
17 Illinois Tool Works Glenview 50,000 Jobs
18 Landis Plastics Alsip 48,000 Jobs
19 Baxter International Deerfield 48,000 Jobs
20 LKQ Chicago 45,500 Jobs
21 Kmart Hoffman Estates 45,000 Jobs
22 Hyatt Hotels Chicago 45,000 Jobs
23 Allstate Northfield 42,900 Jobs
24 RR Donnelley Chicago 42,700 Jobs
25 H Group Holding Chicago 42,000 Jobs
26 Carver Military Academy Chicago 37,322 Jobs
27 Molex Lisle 36,000 Jobs
28 Exelon Chicago 33,400 Jobs
29 Archer Daniels Midland Chicago 32,300 Jobs
30 Tenneco Lake Forest 32,000 Jobs
31 Elite Staffing Chicago 32,000 Jobs
32 Jewel-Osco Itasca 30,000 Jobs
33 AbbVie North Chicago 29,000 Jobs
34 Dover Downers Grove 29,000 Jobs
35 McKinsey Company Chicago 27,000 Jobs
36 Arthur J. Gallagher Co. Rolling Meadows 26,783 Jobs
37 Durham School Services Lisle 26,151 Jobs
38 SP Plus Chicago 26,000 Jobs
39 WW Grainger Lake Forest 25,700 Jobs
40 HSBC North America Holdings Lake Forest 25,151 Jobs
41 McDermott Will Emery Chicago 25,000 Jobs
42 US Foods Rosemont 25,000 Jobs
43 Northwestern Medicine Chicago 24,507 Jobs
44 Ulta Beauty Bolingbrook 24,200 Jobs
45 ULTRA Diamonds Chicago 24,200 Jobs
46 LSC Communications Chicago 24,000 Jobs
47 Fortune Brands Home Security Deerfield 23,870 Jobs
48 Stericycle Lake Forest 23,200 Jobs
49 Lsis Usa Vernon Hills 23,000 Jobs
50 Medline Industries Northfield 23,000 Jobs
51 The Owens Group Chicago 22,500 Jobs
52 BP America Warrenville 22,100 Jobs
53 Health Care Service Chicago 22,000 Jobs
54 OSF HealthCare Peoria 20,912 Jobs
55 Aldi Batavia 20,335 Jobs
56 OSI Group Aurora 20,000 Jobs
57 Hospira Lake Forest 19,000 Jobs
58 Northern Trust Chicago 18,800 Jobs
59 ABN AMRO Chicago 18,720 Jobs
60 Follett Westchester 18,542 Jobs
61 Claire’s Hoffman Estates 18,100 Jobs
62 Dominick’s Finer Foods Oak Brook 18,000 Jobs
63 Reyes Holdings Rosemont 17,792 Jobs
64 Motorola Solutions Chicago 17,000 Jobs
65 Stock Yards Packing Rosemont 16,960 Jobs
66 Swift Processed Meats Co Chicago 16,500 Jobs
67 Lafarge North America Chicago 16,400 Jobs
68 Dominion Energy Chicago 16,200 Jobs
69 Wm Wrigley Jr Company Chicago 16,000 Jobs
70 Discover Financial Services Riverwoods 15,549 Jobs
71 Yaskawa America Waukegan 15,287 Jobs
72 Brunswick Lake Forest 15,116 Jobs
73 Illinois Bell TelephoneCompany Chicago 14,929 Jobs
74 Hospital Sisters Health System Springfield 14,626 Jobs
75 Packaging Corporation of America Lake Forest 14,600 Jobs
76 BMO Harris Bank Chicago 14,200 Jobs
77 Komatsu America Rolling Meadows 14,000 Jobs
78 TreeHouse Foods Oak Brook 13,489 Jobs
79 Addus HomeCare Downers Grove 12,760 Jobs
80 AptarGroup Crystal Lake 12,700 Jobs
81 Conagra Brands Chicago 12,600 Jobs
82 Bally Total Fitness Chicago 12,340 Jobs
83 Flex-N-Gate Urbana 12,150 Jobs
84 UL Northbrook 12,000 Jobs
85 Dyson Chicago 12,000 Jobs
86 Littelfuse Chicago 12,000 Jobs
87 Navistar Lisle 11,926 Jobs
88 Quaker Oats Company Chicago 11,858 Jobs
89 ClearStaff Aurora 11,500 Jobs
90 University of Illinois at Chicago Chicago 11,399 Jobs
91 Ingredion Westchester 11,000 Jobs
92 Amsted Industries Chicago 11,000 Jobs
93 MAT Holdings Long Grove 11,000 Jobs
94 Pactiv Lake Forest 11,000 Jobs
95 NorthShore University HealthSystem Evanston 10,596 Jobs
96 Camping World Lincolnshire 10,227 Jobs
97 Advocate Health Care Downers Grove 9,931 Jobs
98 Telephone and Data Systems Chicago 9,900 Jobs
99 RSM US Chicago 9,670 Jobs
100 Staff Management Chicago 9,150 Jobs

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Author

Chris Kolmar

Chris Kolmar is a co-founder of Zippia and the editor-in-chief of the Zippia career advice blog. He has hired over 50 people in his career, been hired five times, and wants to help you land your next job. His research has been featured on the New York Times, Thrillist, VOX, The Atlantic, and a host of local news. More recently, he's been quoted on USA Today, BusinessInsider, and CNBC.

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