State highway in Hancock County, Ohio, US
State Route 186 (SR 186) is a north–south state highway in the northwestern part of the U.S. state of Ohio. Traveling through mostly rural areas, State Route 186 has its southern terminus at a T-intersection with the U.S. Route 224/State Route 15 concurrency nearly 3.5 miles (5.6 km) south-southeast of McComb. Following a 1-mile (1.6 km) long concurrency with State Route 235 into McComb, State Route 186 arrives at its northern terminus at its junction with State Route 613. North of State Route 613, State Route 235 carries on as a solo route.