Knox County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 3,353. Its county seat is Benjamin. The county was created in 1858 and later organized in 1886. It is named for Henry Knox, an American Revolutionary War general.

Benjamin is a city in and the county seat of Knox County, Texas, United States. Its population was 196 at the 2020 census.