The Mississippi River Delta region is a 3-million-acre (12,000 km2) area of land that stretches from Vermillion Bay on the west, to the Chandeleur Islands in the Gulf of Mexico on the southeastern coast of Louisiana. It is part of the Louisiana coastal plain, one of the largest areas of coastal wetlands in the United States. The Mississippi River Delta is the 7th largest delta on Earth (USGS) and is an important coastal region for the United States, containing more than 2.7 million acres of coastal wetlands (4,000 mi2 or 11,000 km2) and 37% of the estuarine marsh in the conterminous U.S.