Ohio State Route 646

State Route 646 marker
State Route 646
Route information
Maintained by ODOT
Length28.78 mi[1] (46.32 km)
Existed1937–present
Major junctions
West end US 250 in Stock Township
East end SR 43 near Wintersville
Location
CountryUnited States
StateOhio
CountiesHarrison, Jefferson
Highway system
  • Ohio State Highway System
SR 644 SR 647

State Route 646 (SR 646) is a 28.78-mile-long (46.32 km) state highway in Harrison and Jefferson Counties in eastern Ohio. The route runs from US 250 in Stock Township, northwest of Cadiz, to SR 43 in Island Creek Township, just outside Wintersville.

  1. ^ Ohio Department of Transportation. "Technical Services Straight Line Diagrams". Retrieved October 24, 2013.