Severn is a census-designated place (CDP) in Anne Arundel County, Maryland, United States. The population was 57,118 at the 2020 census.[1] [1]"QuickFacts: Severn CDP, Maryland". United States Census Bureau. Retrieved February 5, 2024. This short article about a place or feature in the United States can be made longer. You can help Wikipedia by adding to it.