Livingston has one hospital, the Memorial Medical Center at Livingston The Alabama-Coushatta Indian Reservation is just to the East of Livingston. The 2000 census reported a resident population of 480 persons within the reservation. Livingston is a town in Polk County, Texas, United States. The population was 5,433 at the 2000 census. It is the county seat of Polk County. Livingston was settled in 1835 as Springfield. Its name was changed to Livingston and became the county seat of Polk County in 1846.