Shelbyville is a city in Bedford County, Tennessee, United States. It had a population of 20,335 residents at the 2010 census. Shelbyville, the county seat of Bedford County, was laid out in 1810 and incorporated in 1819. The town is a hub of the Tennessee Walking Horse industry and has been nicknamed "The Walking Horse Capital of the World". Shelbyville is in Middle Tennessee at 35°29′20″N 86°27′8″W (35.488988, -86.452353), on a Highland Rimlimestone bluff upon the banks of Duck River, which flows around the southern and eastern sides of town. According to the United States Census Bureau, the city has a total area of 18.6 square miles (48.2 km2), all land.