Grand Isle (French: Grande-Île) is a town in Jefferson Parish, Louisiana, United States, located on a barrier island of the same name in the Gulf of Mexico. The island is at the mouth of Barataria Bay where it meets the gulf. As of the 2010 census, the town’s resident population was 1,296, down from 1,541 in 2000; during summers, the population, including tourists and seasonal residents, sometimes increases to over 20,000. Grand Isle is statistically part of the New Orleans−Metairie−Kenner Metropolitan Statistical Area, though it is not connected to New Orleans’ continuous urbanized area.
Grand Isle is located at 29°14′N 90°0′W / 29.233°N 90.000°W / 29.233; -90.000 (29.233, −90.000) which corresponds to 54 miles due south of New Orleans. According to the United States Census Bureau, the town covered a total area of 7.8 square miles (20 km), of which 6.1 square miles (16 km) is land and 1.7 square miles (4.4 km) (20.88%) is water.
At the census of 2000, 1,541 people, 622 households, and 436 families lived in the town. The population density was 251.1 inhabitants per square mile (97.0/km). There were 1,875 housing units at an average density of 305.6 per square mile (118.0/km). The racial makeup of the town was 96.04% White, 2.27% Native American, 0.19% African American, 0.19% Asian, 0.39% from other races, and 0.91% from two or more races. Hispanic or Latino of any race were 1.49% of the population.
There were 622 households out of which 29.6% had children under the age of 18 living with them, 54.2% were married couples living together, 8.4% had a female householder with no husband present, and 29.9% were non-families. 24.0% of all households were made up of individuals and 9.3% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 2.89.
In the town, the population was spread out with 23.7% under the age of 18, 7.9% from 18 to 24, 26.3% from 25 to 44, 28.9% from 45 to 64, and 13.2% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 104.6 males. For every 100 females age 18 and over, there were 108.1 males.
The median income for a household in the town was $33,548, and the median income for a family was $35,517. Males had a median income of $34,000 versus $19,333 for females. The per capita income for the town was $18,330. About 9.1% of families and 13.2% of the population were below the poverty line, including 14.3% of those under age 18 and 12.9% of those age 65 or over.