21773 -- U.S. ZIP code Municipality (1990): MYERSVILLE, Maryland All ZIPs for this municipality (1990): 21773 Population (2000): 4950 Housing Units (2000): 1763 Land area (2000): 34.831803 sq. miles (90.213952 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 34.831803 sq. miles (90.213952 sq. km) Located within: Maryland (MD) Location: 39.528123 N, 77.557009 W