Ohio State Route 309

State Route 309
State Route 309
Route information
	Maintained by ODOT
Length	103.579 mi (166.694 km)
Existed	1973–present
Major junctions
West end	US 30 near Delphos
	I-75 near Lima; US 68 / SR 67 in Kenton; US 23 near Marion;
East end	US 30 in Mansfield
Location
Country	United States
State	Ohio
Counties	Allen, Hardin, Marion, Morrow, Crawford, Richland
Highway system
	Ohio State Highway System; Interstate; US; State; Scenic;

State Route 309 (SR 309) is an east–west highway in central Ohio. Its western terminus is at its interchange with U.S. Route 30 (US 30) near Delphos, and its eastern terminus is at its interchange with US 30 in Mansfield. Its current route takes it through the cities of Lima, Kenton, Marion, Galion, and Ontario; as well as the villages of Elida and Caledonia.

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