The state of Illinois currently has a total of 1568 Zip codes. The first digit of all ZIP codes in Illinois is 6. The first two digits can be a combination of 60, 61 or 62. The Illinois ZIP code with the largest population is Zip code 60629 in Chicago. The wealthiest ZIP code in Illinois based on Adjusted Gross income is 60043 in Kenilworth.
- Chicago ZIP Codes
- Aurora ZIP Codes
- Joliet ZIP Codes
- Naperville ZIP Codes
- Rockford ZIP Codes
- Elgin ZIP Codes
- Springfield ZIP Codes
- Peoria ZIP Codes
- Waukegan ZIP Codes
- Champaign ZIP Codes