The Atlantic Coast has significant saltwater marshes, especially in the southeastern U.S., providing critical habitats for wildlife and protecting shorelines.

The Atlantic Coast, particularly along the southeastern U.S. in states like Georgia, South Carolina, and North Carolina, is home to extensive saltwater marshes. These marshes are vital ecosystems that support a variety of plant and animal species, act as nurseries for fish and shellfish, and help protect shorelines from erosion. While the Gulf Coast also has some saltwater marshes, the Atlantic Coast is more widely recognized for these ecosystems. The Pacific Coast and Great Lakes regions do not have extensive saltwater marshes due to their geography and climate.