U.S. Federal Route 23 is a north-south expressway in Western Monroe County. It runs from the Michigan/Ohio State Line, near Sylvania, Ohio, to the Monroe/Washtenaw County Line, near Milan. U.S. Rt. 23 passes through the following towns in Monroe County. Dundee Milan U.S. Rt. 23 is multi-plexed in Monroe County. U.S. Rt. 223, from the Michigan/Ohio State Line to near Ottawa Lake.
U.S. Rt. 23 intersects the following highways in Monroe County. U.S. Rt. 223, near Ottawa Lake.
