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.

Kountze is a city in and the county seat of Hardin County, Texas, United States. The population was 1,981 at the 2020 census. The city is part of the Beaumont–Port Arthur Metropolitan Statistical Area.