Will County / I-55 Corridor

I-55 / I-80

The fast-growing Will County corridor along I-55, I-80, and the Metra Heritage Corridor and Rock Island District. Joliet (the county seat and third-largest city in Illinois) anchors the region with its historic downtown, Harrah's casino, and the Rialto Square Theatre. Plainfield, Bolingbrook, and Romeoville form the primary commuter belt along I-55 north of Joliet, while New Lenox, Frankfort, and Mokena line I-80 to the east. Will County has consistently ranked among the fastest-growing counties in Illinois, with new-construction single-family subdivisions replacing former farmland.