Illinois State Route 13 runs east-west across Central Williamson County. This is a multi-lane highway across the county. IL St Rt 13 passes through the following towns in Williamson County. Carterville
Crainville
Marion
IL St Rt 13 is not multi-plexed in Williamson County. IL St Rt 13 intersects the following highways in Williamson County. Illinois State Route 148, near Energy.
EB IL St Rt 13 at the Jackson/Williamson County Line. EB IL St Rt 13 east of Greenbriar Road. EB IL St Rt 13 west of Main Street in Crainville. EB IL St Rt 13 west of IL St Rt 148. EB IL St Rt 13 at IL St Rt 148. EB IL St Rt 13 east of IL St Rt 148. EB IL St Rt 13 west of Skyline Drive. A street sign in Marion. EB IL St Rt 13 east of Sinclair Drive in Marion. EB IL St Rt 13 east of I-57. EB IL St Rt 13 at I-57. A BGS on NB I-57. A BGS on NB I-57. EB IL St Rt 13 west of Vicksburg Street in Marion. EB IL St Rt 13 at IL St Rt 37. A junction marker on NB IL St Rt 37. EB IL St Rt 13 in Marion. EB IL St Rt 13 east of Marion.
