Illinois 117 is a fairly short route running from east of Peoria, roughly parallel to I-39 north to Toluca.

Intersections from north to south:

IL117 begins in the north at IL17 near Toluca

IL116 joins from the east

IL116 leaves to the west

US24 at Eureka

US150 at Goodfield

IL117 ends in the south at I-74 near Goodfield.

It passes through these towns: Toluca, Roanoke, Eureka, and Goodfield.

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