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U.S. ZIP Code 78681
5-digit United States postal code #78681, Round Rock, TX
ZIP code 78681 is located in the city (place name) Round Rock, сounty Williamson in the state of Texas. The population in ZIP code 78681 is 50606 and the population density is 899.4. ZIP code 78681 refers to сounty Williamson having сounty FIPS 48491, the ratio of people from different counties in this ZIP code is as follows: all county weights - 48491: 100%. In the area of the ZIP code 78681 valid time zone America/Chicago.
ZIP: 78681
County: Williamson
Place Name: Round Rock
State: Texas
State Abbreviation: TX
Coordinates: 30° 32' 0.42" N, 97° 43' 29.1" W
Latitude: 30.533450000000
Longitude: -97.724750000000
Population: 50606
Density: 899.4/km2
Time zone: America/Chicago
County FIPS: 48491
All county weights: 48491: 100%