Michigan State Route 66 runs north-south in Eastern St. Joseph County. It runs from the Branch/St. Joseph County Line to the Indiana/Michigan State Line, via Sturgis. MI St Rt 66 passes through the following towns in St. Joseph County. Leonidas Sturgis
SB MI St Rt 66 near Findley. SB MI St Rt 66 near Sturgis. SB MI St Rt 66 in Sturgis. A junction marker on EB U.S. Rt. 12. SB MI St Rt 66 south of U.S. Rt. 12 in Sturgis. SB MI St Rt 66 south of Sturgis. NB MI St Rt 66 at the Indiana/Michigan State Line.