Arden-on-the-Severn, Maryland, United States [CDP]; population was 2,427 in 1990; housing units was 858 in 1990; location is 39°4'N 76°36'W; land area is 1.62 square miles (1,039 acres); water area is 0.27 square miles (172 acres); FIPS code is 2025 [SourceCBP]