ZIP codes
19
Williamson County, TX Demographics & ZIP Codes
Williamson County, Texas demographics and median household income by ZIP code — 19 ZIP codes — population 569,887 — avg. income $105,384 — avg. home value $371,217. Compare income, housing, and ZIP-level data on US5.
Population
569,887
Median household income (avg.)
$105,384
140% of U.S. median
Average home value
$371,217
107% of U.S. median
Average rent
$1,410
121% of U.S. median
Williamson County demographics
Williamson County, Texas covers 19 ZIP codes, with a combined ZIP-area population of about 569,887.
Median household income in Williamson County
The average median household income across ZIP codes in Williamson County, Texas is about $105,384 — about 43% above the TX ZIP average ($73,553), and about 40% above the U.S. median ($75,149).
Among ZIPs with income data, 78717 (Austin) is near the top at about $140,483, while 76574 (Taylor) is near the bottom at about $72,805.
Housing in Williamson County
For housing in Williamson County, Texas, the average median home value is about $371,217 and the average median rent is about $1,410.
The most populous ZIP is 78613 (Cedar Park) with about 89,162 residents. Use the table below to compare ZIP codes across the county.
ZIP codes in Williamson County
Sort by population, income, or home value. Click a column header to toggle ascending / descending.
| ZIP | City | County | State | Population ↓ | Income | Home value |
|---|---|---|---|---|---|---|
| 78613 | Cedar Park | Williamson County | TX | 89,162 | $120,829 | $461,900 |
| 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 |
| 78626 | Georgetown | Williamson County | TX | 45,020 | $94,967 | $358,500 |
| 78628 | Georgetown | Williamson County | TX | 44,821 | $117,198 | $467,700 |
| 78634 | Hutto | Williamson County | TX | 43,466 | $111,227 | $334,200 |
| 78717 | Austin | Williamson County | TX | 36,085 | $140,483 | $599,200 |
| 78729 | Austin | Williamson County | TX | 30,440 | $81,589 | $434,500 |
| 78633 | Georgetown | Williamson County | TX | 28,877 | $99,967 | $443,500 |
| 78642 | Liberty Hill | Williamson County | TX | 24,146 | $128,086 | $486,800 |
| 76574 | Taylor | Williamson County | TX | 19,746 | $72,805 | $252,000 |
| 76537 | Jarrell | Williamson County | TX | 12,526 | $96,067 | $272,200 |
| 76527 | Florence | Williamson County | TX | 4,686 | $83,533 | $370,400 |
| 76530 | Granger | Williamson County | TX | 2,704 | $102,000 | $277,200 |
| 76578 | Thrall | Williamson County | TX | 1,561 | $100,500 | $315,800 |
| 78615 | Coupland | Williamson County | TX | 1,540 | $112,805 | $348,900 |
| 78674 | Weir | Williamson County | TX | 195 | $95,481 | $43,000 |
| 76573 | — | Williamson County | TX | 22 | — | — |
Frequently asked questions
What are the demographics of Williamson County?
Williamson County, Texas has a combined ZIP-area population of about 569,887 across 19 ZIP codes. Browse the ZIP table for population, income, and housing by code.
What is the median household income in Williamson County?
The average median household income across ZIP codes in Williamson County, Texas is about $105,384, about 43% above the state ZIP average ($73,553), and about 40% above the U.S. median ($75,149). Average median home value is about $371,217. Among ZIPs with data, 78717 (Austin) is near the top ($140,483) and 76574 (Taylor) is near the bottom ($72,805).
How many ZIP codes are in Williamson County?
Williamson County, Texas includes 19 ZIP codes on US5. Each row links to demographics, median income, and housing for that code.
Where can I find ZIP code demographics for Williamson County?
This page lists ZIP codes in Williamson County, Texas with population, median household income, and home value. Select a ZIP for a full demographics profile.