Deale is a census-designated place (CDP) in Anne Arundel County, Maryland, United States. The population was 4,796 at the 2000 census. It has a scenic view of Chesapeake Bay and is popular with boaters. Sudley was listed on the National Register of Historic Places in 1973.
Deale is located at 38°47′30″N 76°32′20″W / 38.79167°N 76.53889°W / 38.79167; -76.53889 (38.791766, -76.538933).
According to the United States Census Bureau, the CDP has a total area of 4.6 square miles (11.8 km²), of which, 4.3 square miles (11.2 km²) of it is land and 0.2 square miles (0.5 km²) of it (4.62%) is water.