Orange is a city in Orange County, Texas, United States. As of the 2010 census, the city population was 18,595. It is the county seat of Orange County, and is the easternmost city in Texas. Located on the Sabine River at the border with Louisiana, Orange is 113 miles from Houston and is part of the Beaumont−Port Arthur Metropolitan Statistical Area. Founded in 1836, it is a deep-water port to the Gulf of Mexico.