21778

from U.S. Gazetteer Zip Code Tabulation Areas (2000)

21778 -- U.S. ZIP code
   Municipality (1990):  ROCKY RIDGE, Maryland
   All ZIPs for this municipality (1990):
                         21778
   Population (2000):    1020
   Housing Units (2000): 382
   Land area (2000):     16.586230 sq. miles (42.958136 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    16.586230 sq. miles (42.958136 sq. km)
   Located within:       Maryland (MD)
   Location:             39.610752 N, 77.341668 W