Port Arthur is a city in Jefferson County within the Beaumont–Port Arthur Metropolitan Statistical Area of the U.S. state of Texas. The population was 53,818 at the 2010 census.
The median income for a household in the city was $26,455, and the median income for a family was $32,143. Males had a median income of $30,915 versus $21,063 for females. The per capita income for the city was $14,183. About 22.9% of families and 25.2% of the population were below the poverty line. Out of the total people living in poverty, 35.2% were under age 18 and 14.4% were age 65 or over.