Battle Creek Cypress Swamp (BCCS) is a forested wetland near Prince Frederick in Calvert County, Maryland, United States.

[1] The Nature Conservancy purchased the wetland, which became the Battle Creek Cypress Swamp Sanctuary, in 1957.

It was the Conservancy's first preserve in Maryland and encompasses 100 acres (40 ha) (about 1% of the 10,060-acre (40.7 km2) watershed of Battle Creek).

A portion of it is now open as a public park with a nature center and quarter-mile boardwalk through the swamp.

It is thought that these trees disappeared from the BCCS area during the most recent Pleistocene glaciation ("Ice Age"), but reappeared around 5,000 to 10,000 years ago as the climate warmed.