Roads of the Mid-South & West > Highways of the State of Illinois > Illinois State Routes 101-199 > Illinois State Route 173
![](/rnb/bill1/il173.JPG) | Illinois State Route 173 | ![](/rnb/bill1b/il173n.JPG) |
Illinois State Route 173 runs east-west across Northeastern Illinois. This runs from the Rockford-Metro to the northern suburbs of the Chicago-Metro Area. Info on IL St Rt 173 is broken down by county below.
![](/rnb/bill1/lakecntyil.JPG)
![](/rnb/bill3/mchenrycntyil.jpg)
![](/rnb/bill1/boonecntyil.JPG)
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