Severn is a census-designated place (CDP) in Anne Arundel County, Maryland, United States. The population was 35,076 at the 2000 census, which is a 30 percent increase over the 24,499 population of 1990. The zipcode is 21144.
Severn is located at 39°7′58″N 76°41′38″W / 39.13278°N 76.69389°W / 39.13278; -76.69389 (39.132841, -76.694002).
According to the United States Census Bureau, the CDP has a total area of 14.0 square miles (36.2 km²), all of it land.