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Zip Code 78634 — Hutto, TX

ZIP Code 78634 is associated with Hutto, TX, in Williamson County. The listed population estimate is 46,413; estimated density is 317.8 people per square mile. Among records with population estimates, it ranks #7 of 18 in Williamson County and #173 of 1,924 in TX.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (30.560000, -97.544040)

Data MetricLocal Statistic
Postal / Zip Code78634
Primary CityHutto
State / ProvinceTX
CountyWilliamson
Total Population46,413
Population Density317.8 people/sq mi
TimezoneAmerica/Chicago

How 78634 Compares

MetricZIP 78634Williamson County recordsTX records
Population estimate46,413591,187 (sum)30,188,035 (sum)
Population Density317.8 /sq mi----
County population rank#7 of 18----
State population rank#173 of 1,924----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in TX

ZIP CodeCityDistancePopulation estimate
ZIP 78665Round Rock5.6 mi66,171
ZIP 78664Round Rock7.2 mi62,060
ZIP 78626Georgetown8.1 mi48,072
ZIP 78674Weir8.4 mi108
ZIP 78660Pflugerville8.6 mi124,834

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →