Winchester is a village in Adams County, Ohio, United States. The population was 1,051 at the 2010 census. The name of the surrounding township is also named Winchester.State Route 136 passes through Winchester. Winchester is adjacent to Ohio State Route 32, a four lane divided highway known as the Appalachian Highway. The Appalachian Highway links Winchester to Cincinnati. A traffic signal is located at the intersection of Routes 32 and 136.