Grand Isle is a town in Jefferson Parish, Louisiana, located on a Bar (landform) of the same name. The island is at the mouth of Barataria Bay where it meets the Gulf of Mexico. As of the United States 2000 Census, the town population was 1,541; during summers, the population has increased to over 20,000. Grand Isle is part of the New Orleans, Louisiana-Metairie, Louisiana-Kenner, Louisiana New Orleans metropolitan area.

Grand Isle's only land connection to the mainland is via an automobile causeway bridge, near the west end of the island, which connects it to southern Lafourche Parish, Louisiana. To reach the rest of Jefferson Parish,...

Grand Isle is a town in Jefferson Parish, Louisiana, located on a Bar (landform) of the same name. The island is at the mouth of Barataria Bay where it meets the Gulf of Mexico. As of the United States 2000 Census, the town population was 1,541; during summers, the population has increased to over 20,000. Grand Isle is part of the New Orleans, Louisiana-Metairie, Louisiana-Kenner, Louisiana New Orleans metropolitan area.

Grand Isle's only land connection to the mainland is via an automobile causeway bridge, near the west end of the island, which connects it to southern Lafourche Parish, Louisiana. To reach the rest of Jefferson Parish, Louisiana by roadway, one has to travel through two different parishes (Lafourche Parish, Louisiana and St. Charles Parish, Louisiana) through a total distance of about.

History
Grand Isle has been repeatedly pummelled by hurricanes through its history. On average, Grand Isle has been affected by tropical storms or hurricanes every 2.68 years since 1877, with hurricane direct hits on average every 7.88 years Only some of the more severe are listed here.

In 1860 a storm surge and great winds resulted in the total devastation of the island.

In the 1893 Atlantic hurricane season Grand Isle was devastated by a storm surge.