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is a city in Tuscarawas County, Ohio, United States. The population was 12,210 at the 2000 census.
Dover is located at (40.526545, -81.477769), along the Tuscarawas River, near the mouth of Sugar Creek.
According to the United States Census Bureau, the city has a total area of 5.3 square miles (13.8 km²), of which, 5.3 square miles (13.6 km²) of it is land and 0.1 square miles (0.2 km²) of it (1.31%) is water.