ZIP Code 78665
Round Rock, Texas · Williamson County
No34778
Zip78665
TypeSTANDARD
Decommissioned0
Primary CityRound Rock
Acceptable Cities—
Unacceptable Cities—
StateTX
LstateTexas
CountyWilliamson County
TimezoneAmerica/Chicago
Area Codes512, 737
World RegionNA
CountryUS
Latitude30,54
Longitude-97,64