Gretna is the second-largest city in and parish seat of Jefferson Parish, Louisiana, United States. Gretna lies on the west bank of the Mississippi River, just east and across the river from uptown New Orleans. It is part of the New Orleans–Metairie–Kenner Metropolitan Statistical Area. The population was 17,736 at the 2010 census.
Gretna is located at 29°54′59″N 90°3′15″W / 29.91639°N 90.05417°W / 29.91639; -90.05417 (29.916459, -90.054260) and has an elevation of 0 feet (0 m)
behind the levee along the Mississippi River.
According to the United States Census Bureau, the city has a total area of 3.9 square miles (10 km), of which 3.5 sq mi (9.1 km) is land and 0.4 sq mi (1.0 km) (9.33%) is water.
As of the census of 2010, there were 17,734 people, 6,958 households, and 4,286 families residing in the city. The population density was 4,685 people per square mile (1,922.0/km²). There were 7,665 housing units at an average density of 2,082 per square mile (845.6/km²). The racial makeup of the city was 48.05% White, 20.43% African American, 1.20% Native American, 8.12% Asian, 0.15% Pacific Islander, 4.03% from other races, and 2.45% from two or more races. Hispanic or Latino of any race were 24.38% of the population.
There were 6,958 households out of which 27.7% had children under the age of 18 living with them, 35.7% were married couples living together, 19.6% had a female householder with no husband present, and 38.4% were non-families. 32.7% of all households were made up of individuals and 11.3% had someone living alone who was 65 years of age or older. The average household size was 2.40 and the average family size was 3.06.
In the city, the age distribution of the population shows 23.8% under the age of 18, 10.2% from 18 to 24, 30.6% from 25 to 44, 21.4% from 45 to 64, and 14.0% who were 65 years of age or older. The median age was 36 years, higher than Louisiana’s median age of 34.0 years. For every 100 females, there were 100.1 males. For every 100 females age 18 and over, there were 98.3 males.
The median income for a household in the city was $28,065, and the median income for a family was $31,881. Males had a median income of $28,259 versus $21,019 for females. The per capita income for the city was $15,735. About 20.8% of families and 24.2% of the population were below the poverty line, including 34.7% of those under age 18 and 20.2% of those age 65 or over.