State Route 19 (SR 19) is a north–south route in northern and central Ohio. Its southern terminus is at U.S. Route 42 in the unincorporated village of Williamsport, and its northern terminus is at State Route 2 north of Oak Harbor.

Quick Facts State Route 19, Route information ...

State Route 19
Route information
Maintained by ODOT
Length	86.48 mi[1] (139.18 km)
Existed	1932–present
Major junctions
South end	US 42 / CR 22 near Mount Gilead
Major intersections	US 30 in Bucyrus US 224 near Bloomville US 20 in Green Creek Township US 6 in Fremont US 6 / US 20 / SR 53 in Fremont
North end	SR 2 near Oak Harbor
Location
Country	United States
State	Ohio
Counties	Morrow, Crawford, Seneca, Sandusky, Ottawa
Highway system
Ohio State Highway System Interstate US State Scenic
← SR 18 → US 20
← US 62 → SR 63

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The current State Route 19 was certified in 1932 and originally went from Galion to Oak Harbor, going through Fremont on State Street (U.S. Route 20) and Stone Street. The route was extended in the north to State Route 2 in 1938, and in the south to U.S. Route 42 in 1939. In 1960, State Route 19 was rerouted around Fremont along with U.S. Route 20, U.S. Route 6, and State Route 53 (Ohio) via a freeway bypass.

The route number 19 was used for the route of an original state highway that went from Columbus to the Pennsylvania state line. This route is now the eastern Ohio portion of U.S. Route 62. The route number was then given to the route of the former State Route 62, which the U.S. highway system had made defunct.