Livingston is a town in and the county seat of Polk County, Texas, United States. With a population of 5,640 at the 2020 census, it is the largest city in Polk County. It is located approximately 46 miles (74 km) south of Lufkin and roughly 74 miles (119 km) northeast of Houston. The city was originally settled in 1835 as Springfield. Its name was changed in 1846 to Livingston, when it was designated as the county seat of Polk County.