Ohio State Route 324 is a short northwest-southeast route in Vinton County. It is a shortcut for those looking to head southeast out of Vinton County, or for those looking to head northwest into Vinton County. The northern end of Ohio Route 324 occurs along Ohio Route 93, in the tiny town of Dundas, just south of McArthur. Ohio Route 324 just runs four miles from there toward the southeast, to end at Ohio Route 160 east of Hamden. Ohio Route 160 continues southeastward, carrying the majority of Ohio Route 324's traffic to Radcliff, Ohio Route 32, or points beyond.