Newton County is the easternmost county in the U.S. state of Texas. As of the 2020 census, its population was 12,217. Its county seat is Newton. The county is named for John Newton, a veteran of the American Revolutionary War. Newton County is included in the Beaumont-Port Arthur Metropolitan Statistical Area. As of 2000, it had the second-lowest population density for all counties in East Texas, behind only Red River County, and the lowest population density in Deep East Texas.