Livingston is a city in and the county seat of Polk County, Texas, United States. With a population of 5,335 at the 2010 census, it is the largest city in Polk County. It is located approximately seventy-five miles north of Houston and was originally settled in 1835 as Springfield. Its name was changed to Livingston and became the county seat of Polk County in 1846.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.