State Route 15 (SR 15) is a north–south and east–west route in northwestern

Ohio Ohio () is a state in the Midwestern region of the United States. Of the fifty U.S. states, it is the 34th-largest by area, and with a population of nearly 11.8 million, is the seventh-most populous and tenth-most densely populated. The sta ...

. Its southern (eastern) terminus is at its interchange with

U.S. Route 23 } U.S. Route 23 or U.S. Highway 23 (US 23) is a major north–south U.S. Highway between Jacksonville, Florida, and Mackinaw City, Michigan. It is an original 1926 route which originally reached only as far south as Portsmouth, Ohio, and has sinc ...

/ State Route 103 (US 23/SR 103) near

Carey Carey may refer to: Names * Carey (given name), a given name * Carey (surname), a surname ** List of people with surname Carey Places Canada * Carey Group, British Columbia; in the Pacific * Carey Island (Nunavut) in James Bay United Kingdom ...

, and its northern (western) terminus is at the

Michigan Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ...

state line north of

Pioneer Pioneer commonly refers to a settler who migrates to previously uninhabited or sparsely inhabited land. In the United States pioneer commonly refers to an American pioneer, a person in American history who migrated west to join in settling and de ...

, where the route continues in Michigan as M-99. The route is signed east–west from Carey to Bryan, and it is signed north–south from there to the Michigan state line. SR 15 is an expressway for its southernmost : where it runs concurrently with

Interstate 75 Interstate 75 (I-75) is a major north–south Interstate Highway in the Great Lakes and Southeastern regions of the United States. As with most Interstates that end in 5, it is a major cross-country, north–south route, traveling from S ...

(I-75), where it runs concurrently with US 68, and the final as a stand-alone

limited-access road A limited-access road, known by various terms worldwide, including limited-access highway, dual-carriageway, expressway, limited access freeway, and partial controlled access highway, is a highway or arterial road for high-speed traffic which ...

until its junction with US 23. The final are part of a heavily traveled corridor providing the most direct route between Detroit, Toledo, Findlay,

Marion Marion may refer to: People *Marion (given name) *Marion (surname) *Marion Silva Fernandes, Brazilian footballer known simply as "Marion" *Marion (singer), Filipino singer-songwriter and pianist Marion Aunor (born 1992) Places Antarctica * Mario ...

and

Columbus Columbus is a Latinized version of the Italian surname "''Colombo''". It most commonly refers to: * Christopher Columbus (1451-1506), the Italian explorer * Columbus, Ohio, capital of the U.S. state of Ohio Columbus may also refer to: Places ...

History

SR 15 was certified in 1923, along the current US 322, which replaced it in 1926. In 1926 the designation was reapplied to a route from Carey to the

Indiana Indiana () is a U.S. state in the Midwestern United States. It is the 38th-largest by area and the 17th-most populous of the 50 States. Its capital and largest city is Indianapolis. Indiana was admitted to the United States as the 19th s ...

state line. In 1929 it was rerouted to Bryan, replacing parts of SR 9. It replaced the rest of SR 9 in 1931, rerouted along its current route to the Michigan state line. In 1966, SR 15 was rerouted on an

expressway Expressway may refer to: * Controlled-access highway, the highest-grade type of highway with access ramps, lane markings, etc., for high-speed traffic. * Limited-access road, a lower grade of highway or arterial road. *Expressway, the fictional s ...

from I-75 in Findlay to US 23 in Carey, its new southern (eastern) terminus. The highway runs a few miles south of its previous routing, which was recertified as SR 568 the same year.

Major intersections

References

External links

{{Attached KML, display=title,inline 015 Transportation in Wyandot County, Ohio Transportation in Hancock County, Ohio Transportation in Putnam County, Ohio Transportation in Defiance County, Ohio Transportation in Williams County, Ohio