These Are The 100 Largest Companies In Illinois

Chris Kolmar
by Chris Kolmar
Biggest Companies, Rankings - 10 months ago
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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. McDonald’s
  2. Walgreens
  3. Sears Holdings
  4. Caterpillar
  5. United Airlines
  6. Mondelēz International
  7. JLL
  8. Abbott
  9. Advocate Health Care
  10. John Deere

McDonald’s comes in at the top, with more current employees than any other company in the . 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 1,519 companies.

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

As it turns out, McDonald’s looks to the be the biggest company in Illinois clocking in with 375,000 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:

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Detailed List Of The 100 Biggest Companies In Illinois

Rank Company City Employees
1 McDonald’s Oak Brook 375,000
2 Walgreens Deerfield 253,400
3 Sears Holdings Hoffman Estates 140,000
4 Caterpillar Deerfield 95,400
5 United Airlines Chicago 90,600
6 Mondelēz International Deerfield 90,000
7 JLL Chicago 77,300
8 Abbott North Chicago 75,000
9 Advocate Health Care Downers Grove 70,000
10 John Deere Moline 56,767
11 AIM Specialty Health Deerfield 56,000
12 ITW Glenview 50,000
13 Upp Technology Villa Park 50,000
14 Aon Chicago 49,800
15 Baxter International Deerfield 48,000
16 Hyatt Hotels Chicago 45,000
17 RRD Chicago 44,360
18 Allstate Northbrook 43,275
19 LKQ Chicago 42,500
20 Exelon Chicago 34,396
21 Sears Hoffman Estates 34,240
22 Elite Staffing Chicago 32,000
23 ADM Chicago 31,800
24 Jewel-Osco Chicago 30,000
25 AbbVie Lake Bluff 29,000
26 Dover Downers Grove 29,000
27 Durham School Services Lisle 26,151
28 Stericycle Lake Forest 25,000
29 McDermott Will & Emery Chicago 25,000
30 US Foods Rosemont 25,000
31 Grainger Lake Forest 25,000
32 Arthur J. Gallagher & Co. Rolling Meadows 24,790
33 Northwestern Medicine Chicago 24,507
34 Fortune Brands Home & Security Deerfield 22,700
35 The Owens Group Chicago 22,500
36 LSC Communications Chicago 22,000
37 Ulta Beauty Bolingbrook 21,700
38 McKinsey & Company Inc Chicago 20,368
39 ALDI USA Batavia 20,335
40 Hospira Lake Forest 19,000
41 The University of Chicago Chicago 18,960
42 Follett Westchester 18,542
43 Dominick’s Finer Foods Inc Oak Brook 18,000
44 Reyes Holdings Rosemont 17,792
45 Northern Trust Chicago 17,600
46 Bridgestone Retail Operations Bloomingdale 17,044
47 BMO Harris Bank Chicago 16,889
48 Transdev North America Lombard 16,470
49 TreeHouse Foods Oak Brook 16,027
50 Discover Riverwoods 15,549
51 OSF HealthCare Peoria 15,488
52 Brunswick Lake Forest 14,415
53 Health Care Service Chicago 14,264
54 Motorola Solutions Chicago 14,000
55 Packaging Corporation of America Lake Forest 14,000
56 Komatsu Rolling Meadows 14,000
57 University of Illinois at Chicago Chicago 13,040
58 Addus HomeCare Downers Grove 12,760
59 Aptar Crystal Lake 12,700
60 Conagra Brands Chicago 12,600
61 Bally Total Fitness Chicago 12,340
62 Flex-N-Gate Urbana 12,150
63 Pactiv Lake Forest 12,000
64 Medline Industries Northfield 12,000
65 Navistar Lisle 11,926
66 Quaker Chicago 11,858
67 ClearStaff Aurora 11,500
68 Amsted Industries Chicago 11,000
69 Ingredion Westchester 11,000
70 MAT Holdings Long Grove 11,000
71 Littelfuse Chicago 10,300
72 TDS Chicago 10,300
73 Molex CES Lisle 10,001
74 OSI Group Aurora 9,200
75 SNI Companies Chicago 9,000
76 HAVI Downers Grove 9,000
77 City of Chicago Chicago 9,000
78 Adtalem Global Education Downers Grove 8,956
79 CDK Global Hoffman Estates 8,900
80 Anixter Glenview 8,900
81 CDW Vernon Hills 8,787
82 Univar Downers Grove 8,700
83 Zurich Insurance Schaumburg 8,518
84 Andy Frain Services Aurora 8,500
85 RQA Orland Park 8,500
86 PSAV Schiller Park 8,350
87 Groupon Chicago 8,323
88 Tenneco Lake Forest 8,250
89 Tribune Media Chicago 8,200
90 Fontana America Elgin 8,200
91 Middleby Elgin 8,026
92 Innovel Solutions Hoffman Estates 8,000
93 Knowles Itasca 8,000
94 Trustmark Companies Lake Forest 7,872
95 Hearthside Food Solutions Downers Grove 7,850
96 Oscar Mayer Chicago 7,500
97 CHICAGO TRANSIT AUTHORITY Chicago 7,500
98 Crate and Barrel Northbrook 7,500
99 Potbelly Chicago 7,400
100 Camping World Lincolnshire 7,366

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