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

State Route 1
Location: New ParisBridgeport
Existed: 1912–1926

State Route 1
Location: Cincinnati-Conneaut
Existed: 1961–1965

State Route 5
Location: Delphos-Wooster
Existed: 1923–1931

State Route 6
Location: Cincinnati-Toledo
Existed: 1923–1926

State Route 6
Location: Bridgeport-Norwalk
Existed: 1927–1928

State Route 6
Location: Cleveland-Painesville
Existed: 1929–1931

State Route 9
Location: Cincinnati-Pioneer
Existed: 1923–1930

State Route 10
Location: Delphos-Plain Township
Existed: 1923–1926

State Route 10
Location: Washington Court House-Zanesville
Existed: 1927–1931

State Route 10
Location: Aberdeen-Toledo
Existed: 1932–1932

This is a list of former state routes in Ohio since 1923 with route numbers from 1 through 49 inclusive. For a full list of former state highways in Ohio, see the list of state routes in Ohio.

SR 1, formerly known as Inter-county Highway 1 until 1921 and State Highway 1 in 1922, was the designation for the National Road and National Old Trails Road through central Ohio between 1912 and 1926.US 40 was first signed along the length of the route in 1926 and became the road's only designation by 1927.

SR 1 was the designation for a proposed toll road connecting Cincinnati and Pennsylvania that existed between 1961 and 1965. As the freeway portions were not built yet, SR 1 was routed along local roads until a corresponding freeway section was completed. SR 1 generally followed what is now I-75 between Cincinnati and Dayton, SR 4 between Dayton and Fairborn, US 40 and I-70 between Fairborn and Columbus, I-71 between Columbus and Cleveland, and I-90 between Cleveland and the Pennsylvania state line at Conneaut.


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