Port Arthur is a city located in Jefferson County, Texas. With a 2020 population of 54,766, it is the 65th largest city in Texas and the 718th largest city in the United States. Port Arthur is currently declining at a rate of -0.23% annually but its population has increased by 1.76% since the most recent census, which recorded a population of 53,818 in 2010. Port Arthur reached it's highest population of 66,766 in 1960. Spanning over 144 miles, Port Arthur has a population density of 712 people per square mile.
The average household income in Port Arthur is $49,787 with a poverty rate of 27.55%. The median rental costs in recent years comes to $787 per month, and the median house value is $65,700. The median age in Port Arthur is 34.2 years, 34.1 years for males, and 34.3 years for females. For every 100 females there are 93.9 males.