Route 185 is a highway in eastern Missouri. Its northern terminus is at Route 100 west of Washington; its southern terminus is at Route 8 in Potosi. A spur of Highway 185 goes into Meramec State Park, Miramiguoa Park, and Meramec Conservation Area.
Route 185 Spur is a , winding road that leads into Miramiguoa Park on the east side of Sullivan.