Illinois State Route 105 is the main route through Central Piatt County. This route runs east-west through the west-center portion of the county, before running north-south at the center of county. IL St Rt 105 passes through the following towns in Piatt County. Cerro Gordo
A junction marker on NB IL St Rt 32. Looking west along IL St Rt 105 at IL St Rt 32. NB IL St Rt 32/EB IL St Rt 105 south of Cerro Gordo. NB IL Sr Rt 32/EB IL St Rt 105 in Cerro Gordo. SB IL St Rt 105 near Milmine. SB IL St Rt 105 south of Bement. SB IL St Rt 105 in Bement. NB IL St Rt 105 in Monticello. SB IL St Rt 105 at I-72. A BGS on EB I-72. The northern end. The northern end marker. A marker at the northern begin.
