21930 -- U.S. ZIP code Population (2000): 108 Housing Units (2000): 60 Land area (2000): 0.780628 sq. miles (2.021818 sq. km) Water area (2000): 0.005620 sq. miles (0.014557 sq. km) Total area (2000): 0.786248 sq. miles (2.036375 sq. km) Located within: Maryland (MD) Location: 39.365119 N, 75.884996 W