"-4" . "21144" . . "-5" . "Severn is a census-designated place (CDP) in Anne Arundel County, Maryland, United States. The population was 44,231 at the 2010 census, a 26% increase from its population of 35,076 at the 2000 census. The zip code is 21144."@en . . "4.59e+07"^^ . "Severn, Maryland"@en . "964.1"^^ . . "44231"^^ . "410" . . "49.0"^^ . . . "4.59e+07"^^ . . "49.0728"^^ . "0.0"^^ .