Ohio State Route 603


State Route 603 is a north-south state highway in the northern portion of the U.S. state of Ohio. Its southern terminus is at State [Route 95 (Ohio)|State Route 95] near Perrysville, and its northern terminus is at State [Route 61 (Ohio)|State Routes 61] and 98 in Plymouth along the Baseline Road that separates Huron [County, Ohio|Huron County] and Richland County, and subsequently the southern boundary of the Firelands and Connecticut Western Reserve.

History

SR 603 was commissioned in 1938 along its current alignment, between Richland County, Ohio|Shiloh] and SR 95. Between 1953 and 1955 the route was paved. The route was extended west to Plymouth between 1959 and 1961.

Major intersections