Hardin County is a county located in the U.S. state of Texas, United States. As of the 2020 census, its population was 56,231. The county seat is Kountze. The county is named for the family of William Hardin from Liberty County, Texas.

Liberty County is a county in the U.S. state of Texas. As of the 2020 census, its population was 91,628. The county seat is Liberty. It was founded in 1831, as a municipality in Mexico as Villa de la Santísima Trinidad de la Libertad by commissioner José Francisco Madero and organized as a county of the Republic of Texas in 1836. Its name was anglicized as Liberty based on the ideal of American liberty.