List of former state routes in Ohio explained

Caption:	Typical highway markers
Formed:	1912, renumbered in 1923, 1927, 1962
Statehwy:	State Route nn (SR nn)
Links:	OH

List of former state routes in Ohio (1–49)

List of former state routes in Ohio (50–130)

List of former state routes in Ohio (142–219)

List of former state routes in Ohio (223–270)

List of former state routes in Ohio (271–352)

List of former state routes in Ohio (354–568)

List of former state routes in Ohio (569–673)

List of former state routes in Ohio (675–824)