The 100 Largest Companies In Illinois For 2020

Chris Kolmar
by Chris Kolmar
Biggest Companies, Rankings - 3 weeks ago

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

What’s The Largest Company In Illinois?

Walgreen Co is the largest company headquartered in Illinois based on our database of 10 million resumes. It has 253,400 employees. See the full table or the methodology below.

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. Walgreen Co
  2. McDonald’s
  3. Boeing
  4. Caterpillar
  5. United Continental Holdings
  6. Sears Holdings
  7. Mondelez International
  8. Veolia Environmental Services
  9. JLL
  10. Abbott

Walgreen Co 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 1,567 companies.

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

As it turns out, Walgreen Co 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.

If you’re interested, you can read more about the Illinois job scene here:

Detailed List Of The 100 Biggest Companies In Illinois

Rank Company City Employees
1 Walgreen Co Deerfield 253,400
2 McDonald’s Oak Brook 210,000
3 Boeing Chicago 153,027
4 Caterpillar Deerfield 101,500
5 United Continental Holdings Chicago 90,600
6 Sears Holdings Hoffman Estates 89,000
7 Mondelez International Deerfield 83,000
8 Veolia Environmental Services Northbrook 77,864
9 JLL Chicago 77,300
10 Abbott North Chicago 75,000
11 Advocate Health Care Downers Grove 70,000
12 State Farm Bloomington 65,664
13 John Deere Moline 56,767
14 Grant Thornton Chicago 53,000
15 Cushman & Wakefield Chicago 51,000
16 Illinois Tool Works Glenview 50,000
17 Upp Technology Hinsdale 50,000
18 Baxter International Deerfield 48,000
19 LKQ Chicago 45,500
20 Hyatt Chicago 45,000
21 Allstate Northbrook 43,275
22 RR Donnelley & Sons Company Chicago 42,700
23 H Group Holding Chicago 42,000
24 Levy Restaurants Chicago 40,000
25 Exelon Chicago 33,400
26 Archer Daniels Midland Chicago 32,300
27 Elite Staffing Chicago 32,000
28 Jewel-Osco Itasca 30,000
29 AbbVie North Chicago 29,000
30 Dover Downers Grove 29,000
31 Arthur J. Gallagher & Co. Rolling Meadows 26,783
32 Durham School Services Lisle 26,151
33 SP Plus Chicago 26,000
34 HSBC North America Holdings Lake Forest 25,151
35 WW Grainger Lake Forest 25,000
36 McDermott Will & Emery Chicago 25,000
37 US Foods Rosemont 25,000
38 Northwestern Medicine Chicago 24,507
39 Ulta Beauty Bolingbrook 24,200
40 LSC Communications Chicago 24,000
41 Fortune Brands Home & Security Deerfield 23,870
42 Stericycle Lake Forest 23,200
43 Medline Industries Northfield 23,000
44 LSIS USA Vernon Hills 23,000
45 The Owens Group Chicago 22,500
46 BP America Warrenville 22,100
47 Health Care Service Chicago 22,000
48 OSF HealthCare Peoria 20,912
49 OSI Group Aurora 20,000
50 Northern Trust Chicago 18,800
51 Follett Westchester 18,542
52 Dominick’s Finer Foods Oak Brook 18,000
53 Reyes Holdings Rosemont 17,792
54 Transdev North America Lombard 16,470
55 Lafarge North America Chicago 16,400
56 Motorola Solutions Chicago 16,000
57 Discover Financial Services Riverwoods 15,549
58 Hospital Sisters Health System Springfield 14,626
59 Packaging Corporation of America Lake Forest 14,600
60 Brunswick Lake Forest 14,415
61 BMO Harris Bank Chicago 14,200
62 Komatsu America Rolling Meadows 14,000
63 TreeHouse Foods Oak Brook 13,489
64 University of Illinois at Chicago Chicago 13,450
65 Chapin Hall Center For Children Chicago 12,740
66 Aptar Crystal Lake 12,700
67 Conagra Brands Chicago 12,600
68 Bally Total Fitness Chicago 12,340
69 Navistar International Lisle 12,300
70 Flex-N-Gate Urbana 12,150
71 Littelfuse Chicago 12,000
72 Adtalem Global Education Downers Grove 12,000
73 UL Northbrook 12,000
74 Quaker Oats Company Chicago 11,858
75 ClearStaff Chicago 11,500
76 MAT Holdings Long Grove 11,000
77 Ingredion Westchester 11,000
78 Amsted Industries Chicago 11,000
79 Pactiv Lake Forest 11,000
80 Conagra Brands Chicago 10,940
81 Camping World Lincolnshire 10,227
82 Tenneco Lake Forest 10,030
83 Sara Lee Downers Grove 10,001
84 Molex Lisle 10,001
85 Telephone and Data Systems Chicago 9,900
86 RSM US Chicago 9,670
87 HAVI Downers Grove 9,000
88 SNI Companies Chicago 9,000
89 CDK Global Hoffman Estates 8,900
90 Anixter Glenview 8,900
91 CDW Vernon Hills 8,787
92 Univar Downers Grove 8,700
93 Alight.com Lincolnshire 8,700
94 Zurich Schaumburg 8,518
95 Andy Frain Services Aurora 8,500
96 RQA Orland Park 8,500
97 PSAV Schiller Park 8,350
98 Tribune Media Chicago 8,200
99 Fontana America Elgin 8,200
100 Kemper Chicago 8,100

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