De Witt County Highway 18 runs briefly southeast of Clinton. It runs between De Witt County Highway 1 and De Witt County Highway 15. DWCH 18 does not pass through any towns in De Witt County. DWCH 18 intersects the following highways in De Witt County. De Witt County Highway 1, near Clinton. De Witt County Highway 15, near Ospur.
A DWCH 18 guild marker. SB DWCH 18 south of DWCH 1.
