ZIP codes
3
Round Rock, TX Demographics & ZIP Codes
Round Rock, Texas demographics and median household income by ZIP code (in Williamson County) — 3 ZIP codes — population 184,890 — median income $113,125 — avg. home value $405,367. Compare income, housing, and population across ZIP codes on US5.
Population
184,890
Median household income (avg.)
$113,125
151% of U.S. median
Average home value
$405,367
116% of U.S. median
Average rent
$1,587
136% of U.S. median
Median age (avg.)
36.6
Round Rock demographics
Round Rock, Texas covers 3 ZIP codes primarily in Williamson County, with a combined ZIP-area population of about 184,890.
Across ZIP codes with age data, the average median age is about 36.6 years.
Median household income in Round Rock
The average median household income across ZIP codes in Round Rock, Texas is about $113,125 — about 54% above the TX ZIP average ($73,553), and about 51% above the U.S. median ($75,149).
Among ZIPs with income data, 78681 is near the top at about $136,215, while 78664 is near the bottom at about $85,919.
Housing in Round Rock
For housing in Round Rock, Texas, the average median home value is about $405,367 and the average median rent is about $1,587.
The most populous ZIP in this set is 78665 (about 64,087 residents). Use the table below to compare population, income, and home values across codes.
ZIP codes in Round Rock
Sort by population, income, or home value. Click a column header to toggle ascending / descending.
| ZIP | City | County | State | Population ↓ | Income | Home value |
|---|---|---|---|---|---|---|
| 78665 | Round Rock | Williamson County | TX | 64,087 | $117,240 | $438,700 |
| 78664 | Round Rock | Williamson County | TX | 62,272 | $85,919 | $317,400 |
| 78681 | Round Rock | Williamson County | TX | 58,531 | $136,215 | $460,000 |
Frequently asked questions
What are the demographics of Round Rock?
Round Rock, Texas has a combined ZIP-area population of about 184,890 across 3 ZIP codes (primarily Williamson County). Browse the ZIP table below for population, income, and housing by code.
What is the median household income in Round Rock?
The average median household income across ZIP codes in Round Rock, Texas is about $113,125, about 54% above the state ZIP average ($73,553), and about 51% above the U.S. median ($75,149). Average median home value is about $405,367. Among ZIPs with data, 78681 is near the top ($136,215) and 78664 is near the bottom ($85,919).
How many ZIP codes are in Round Rock?
Round Rock, Texas includes 3 ZIP codes on US5. Each row links to demographics, median income, and housing for that code.
Where can I find ZIP code demographics for Round Rock?
This page lists ZIP codes in Round Rock, Texas with population, median household income, and home value. Select a ZIP for a full demographics profile.