State Route 120 is an east–west state highway in the northwestern portion of the U.S. state of Ohio. Its western terminus is at the Michigan state line, where an unnumbered county highway (Morenci Road, formerly M-120) continues west-northwest. State Route 120’s eastern terminus is in Toledo at State Route 65; the route is, for all practical purposes, a spur of U.S. Route 20, which generally bypasses Toledo to the west and south.