Port Sulphur is a census-designated place (CDP) on the West Bank of the Mississippi River in Plaquemines Parish, Louisiana, United States. The population was 1,760 at the 2010 census.
Port Sulphur is located at 29°29′40″N 89°42′45″W / 29.49444°N 89.71250°W / 29.49444; -89.71250 (29.494496, -89.712383).
According to the United States Census Bureau, the CDP has a total area of 8.5 square miles (22 km), of which 5.5 square miles (14 km) is land and 3.0 square miles (7.8 km) (35.29%) is water.
As of the census of 2000, there were 3,115 people, 1,055 households, and 796 families residing in the CDP. The population density was 514.1 people per square mile (198.5/km²). There were 1,222 housing units at an average density of 201.7 per square mile (77.9/km²). The racial makeup of the CDP was 45.33% White, 44.43% African American, 7.03% Native American, 0.61% Asian, 0.03% Pacific Islander, 0.90% from other races, and 1.67% from two or more races. Hispanic or Latino of any race were 0.96% of the population.
There were 1,055 households out of which 37.3% had children under the age of 18 living with them, 49.8% were married couples living together, 20.0% had a female householder with no husband present, and 24.5% were non-families. 20.8% of all households were made up of individuals and 9.1% had someone living alone who was 65 years of age or older. The average household size was 2.93 and the average family size was 3.43.
In the CDP, the population was spread out with 30.8% under the age of 18, 10.1% from 18 to 24, 26.3% from 25 to 44, 22.2% from 45 to 64, and 10.6% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 93.6 males. For every 100 females age 18 and over, there were 90.1 males.
The median income for a household in the CDP was $30,188, and the median income for a family was $33,021. Males had a median income of $29,609 versus $23,194 for females. The per capita income for the CDP was $13,553. About 20.5% of families and 22.2% of the population were below the poverty line, including 25.7% of those under age 18 and 22.4% of those age 65 or over.