Grand Isle is a town

Town

A town is a human settlement larger than a village but smaller than a city. The size a settlement must be in order to be called a "town" varies considerably in different parts of the world, so that, for example, many American "small towns" seem to British people to be no more than villages, while...

 in Jefferson Parish

Jefferson Parish, Louisiana

Jefferson Parish is a parish in Louisiana, United States that includes most of the suburbs of New Orleans. The seat of parish government is Gretna....

, Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

, located on a barrier island

Bar (landform)

A shoal, sandbar , or gravelbar is a somewhat linear landform within or extending into a body of water, typically composed of sand, silt or small pebbles. A spit or sandspit is a type of shoal...

 of the same name in the Gulf of Mexico

Gulf of Mexico

The Gulf of Mexico is a partially landlocked ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. In...

. The island is at the mouth of Barataria Bay

Barataria Bay

Barataria Bay, also Barrataria Bay, is a bay of the Gulf of Mexico that is located in southeastern Louisiana, in Jefferson Parish and Plaquemines Parish, United States....

 where it meets the gulf. As of the 2000 census, the town population was 1,541; during summers, the population sometimes increases to over 20,000. Grand Isle is part of the New Orleans

New Orleans, Louisiana

New Orleans is a major United States port and the largest city and metropolitan area in the state of Louisiana. The New Orleans metropolitan area has a population of 1,235,650 as of 2009, the 46th largest in the USA. The New Orleans – Metairie – Bogalusa combined statistical area has a population...

–Metairie

Metairie, Louisiana

Metairie is a census-designated place in Jefferson Parish, Louisiana, United States and is a major part of the New Orleans Metropolitan Area. Metairie is the largest community in Jefferson Parish. It is an unincorporated area that would be larger than most of the state's cities if it were...

–Kenner

Kenner, Louisiana

Kenner is a city in Jefferson Parish, Louisiana, United States, and a suburb of New Orleans. The population was 66,702 at the 2010 census....

 Metropolitan Statistical Area

New Orleans metropolitan area

New Orleans–Metairie–Kenner, or the Greater New Orleans Region is a metropolitan area designated by the United States Census encompassing seven parishes in the state of Louisiana, centering on the city of New Orleans...

.

Grand Isle's main street is the sea-side start of Louisiana Highway 1

Louisiana Highway 1

Louisiana Highway 1 is a state highway in Louisiana. At 436.20 miles , it is the longest numbered highway of any class in Louisiana. It runs diagonally across the state, connecting the oil and gas fields near the island of Grand Isle with the northwest corner of the state, north of Shreveport.The...

, aka Route 1, that stretches 436.20 miles away to the north-west corner of the state ending near Shreveport, Louisiana

Shreveport, Louisiana

Shreveport is the third largest city in Louisiana. It is the principal city of the fourth largest metropolitan area in the state of Louisiana and is the 109th-largest city in the United States....

.