Pennsylvania Route 86 is a 12.4-mile-long (20.0 km) state highway in Crawford County, Pennsylvania, United States. The northern terminus of the route is at U.S. Route 6, U.S. Route 19, and Pennsylvania Route 408 in Cambridge Springs. The southern terminus is at Pennsylvania Route 27 in Meadville.

Crawford County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 83,938. Its county seat is Meadville. The county was created on March 12, 1800, from part of Allegheny County and named for Colonel William Crawford. The county is part of the Northwest Pennsylvania region of the state.