Winchester is a city in White River Township, Randolph County, Indiana, United States. The population was 4,935 at the 2010 census. The city is the county seat of Randolph County. It is the home of Winchester Speedway.
Winchester is located at 40°10′23″N 84°58′39″W / 40.17306°N 84.9775°W / 40.17306; -84.9775 (40.173165, -84.977435).
According to the United States Census Bureau, the city has a total area of 3.1 square miles (8.0 km²), all of it land.