Roads of the Mid-South & West > Highways of the State of Illinois > Illinois State Routes 101-199 > Illinois State Route 166 > Illinois State Route 166, Williamson County

Illinois State Route 166
Williamson County

Illinois State Route 166 is a north-south highway in Southeastern Williamson County. This runs from Illinois State Route 13, near Pittsburg to the Williamson/Johnson County Line, near New Burnside.

IL St Rt 166 passes through the following town in Williamson County.
Marion

Creal Springs

IL St Rt 166 is not multi-plexed in Williamson County.

IL St Rt 166 intersects the following highway in Williamson County.

Illinois State Route 13, near Pittsburg.


A junction marker on EB IL St Rt 13.

A Williamson County mile marker.

The northern end of IL St Rt 166 at IL St Rt 13, near Pittsburg.

The northern end marker.

26 November 2018