Round Rock, TX ZIP Codes

Total ZIPs

139,523

Total Population

ZIP Codes in Round Rock, TX

ZIP Code	Population	Density	Timezone
78664	52,932	1,233	America/Chicago
78681	50,606	899	America/Chicago
78665	35,985	741	America/Chicago

All data sourced from the U.S. Census Bureau, American Community Survey (ACS) 5-Year Estimates (2023).

PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.