Illinois State Route 23 has its southern end in Livingston County. This highway connects northwestern Livingston County to the county seat, Pontiac. IL St Rt 23 passes through the following towns. South Streator
Cornell
Pontiac
IL St Rt 23 is not multi-plexed in Livingston County. IL St Rt 23 intersects the following highways in Livingston County. Illinois State Route 17, near Reading.
NB IL St Rt 23 in South Streator. NB IL St Rt 23 near Ancona. SB IL St Rt 23 in Cornell. BGS on NB I-55 at Pontiac. The southern end in Pontiac. The southern end marker.
