State Route 113 is an east–west highway in north central and northeastern Ohio. Its western terminus is at State Route 269 in Bellevue, where State Route 113 is initially concurrent with U.S. Route 20 and State Route 18; its eastern terminus is at the U.S. Route 6 / State Route 2 concurrency in Rocky River. Most of its eastern portion is also in a concurrency with U.S. Route 20.

State Route 113 is an original state highway that originally went from State Route 9 (now U.S. Route 127) at the small town of Latty to State Route 15 near Continental. The route's western terminus was extended to the Indiana state line in 1926, and its eastern terminus was extended to State Route 109 north of Ottawa the same year.

By 1935, the route had extended to State Route 18 near Bloomdale. Three years later it was extended again, this time all the way to Bellevue, by overlapping State Route 18 and State Route 12, then following the Sandusky County/Seneca County line to Bellevue. State Route 113 was extended twice more – to Elyria in 1939, and to its current eastern terminus in 1940.

In 1959, when the bypass around Fremont opened, State Route 113 was rerouted along it, following State Route 12 from Bettsville to State Route 53, then following that route on the bypass and overlapping U.S. Route 20 from Fremont to Bellevue, where it continued on its old route to Rocky River. Except for a small stretch of road in downtown Fostoria, State Route 113 was now completely concurrent from Bloomdale to Bellevue. Thus, in 1970, it was decided that the route should be split into two separate highways. The concurrencies were removed, State Route 113 was truncated at Bellevue, and the western part of the route (from the Indiana state line to Fostoria) was recertified as State Route 613.