Port Arthur is a city in Jefferson County within the Beaumont–Port Arthur metropolitan area of the U.S. state of Texas. A small, uninhabited portion extends into Orange County. It is 90 mi east of Houston. The largest oil refinery in the United States, the Motiva Refinery is located in Port Arthur.The population of Port Arthur was 53,818 at the 2010 census, down from 57,755 at the 2000 census. Early attempts at settlements in the area had all failed.... Show more

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