Where is Will County, Illinois?


Quick Answer

Will County is a county in the northernmost and easternmost part of Illinois, just south of Chicago. Its largest city is Joliet, which is the county seat.

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Full Answer

Will County was founded in January of 1836 and covers 837 square miles of land. Its population of 677,000 makes it the fourth-most populous county in Illinois.

Will County is one of the five collar counties of the Chicago-Naperville-Elgin metropolitan area, which covers areas in Illinois, Indiana and Wisconsin. As a result of this, Will County is home to five different area codes that are spread across Joliet, northern Will County and eastern Will County.

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