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We figured out the best fortune 500 companies to work for in Illinois using data on salaries, company financial health, and employee diversity. You can also search for the best fortune 500 companies to work for in any other state or city.

Zippia score 4.4
Discover Financial Services is a direct banking and payment services company operating the Discover card and America's first cash rewards credit card. It is one of the largest card issuers in the United States. Beyond its flagship credit business, it also offers personal and student loans, home and home equity loans, online savings products, certificates of deposit, and money market accounts. Its payment businesses consist of Discover Financial Services' Discover Network, with millions of merchant and cash access locations; PULSE, one of the nation's leading ATM/debit networks; and Diners Club International, a global payments network with acceptance in more than 185 countries and territories. Discover Financial Services was founded in 1985 and is based in Deerfield, I.L.
Zippia score 4.6
Cognizant (Nasdaq-100: CTSH) is a professional services companies, transforming clients' business, operating and technology models for the digital era. Our unique industry-based, consultative approach helps clients envision, build and run more innovative and efficient businesses. Headquartered in the U.S., Cognizant is ranked 195 on the Fortune 500 and is consistently listed among the most admired companies in the world. Learn how Cognizant helps clients lead with digital at www.cognizant.com or follow us @Cognizant
| Rank | Company | Zippia score |
|---|---|---|
| 1 | Discover |