The Coastal Plains in the U.S. are divided into two main regions: the Atlantic Coastal Plain and the Gulf Coastal Plain.

The Atlantic Coastal Plain extends from New Jersey down to Florida, featuring a variety of ecosystems, including wetlands, marshes, and estuaries. This region is known for its fertile soil, making it ideal for agriculture and diverse wildlife habitats. The Gulf Coastal Plain, stretching from Texas to Florida, encompasses areas along the Gulf of Mexico, characterized by low-lying landscapes, sandy beaches, and rich marine biodiversity. Both regions play vital roles in the economy, supporting agriculture, tourism, and maritime activities. Together, the Atlantic and Gulf Coastal Plains highlight the ecological and economic significance of these coastal areas, contributing to the overall environmental health of the United States.