Union, Illinois Area Code

Union, IL Area Codes are

815 and 779

Union, IL is currently using an area code overlay in which area codes 779 and 815 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to Union, IL area code information read more about area codes 779 and 815 details and Illinois area codes.

Union, IL is located in McHenry County and observes the Central Time Zone.
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Illinois Area Code Map