Length: 197.39 mi. Direction: west-east. Ohio State Route 18 (SR 18) is a highway in the northern part of Ohio that begins near Hicksville at the Indiana state line, and ends in Akron. The road passes through the counties of Defiance, Henry, Wood, Hancock, Seneca, Sandusky, Huron, Lorain, Medina, and Summit. It was opened in 1924.
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