County ProfileTX
Williamson County
Population: 609,017 · 26 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
609,017
People
Median age
37.3
Housing
Total households
252,323
Income
Median household income
$111,340
Housing
Total housing units
262,644
Employment
Employment rate
67.7%
Education
Bachelor’s degree or higher
48.4%
Healthcare
Insured population
90.2%
County details
Local time 00:50:15(CT)| Name | Williamson |
|---|---|
| Total ZIP codes | 26total |
| ZIP codes (by type) | 18 Standard7 PO Box1 Unique |
| Area code | 254, 512, 737 |
| Timezone | Central Time (CT) |
| Coordinates | 30.6490817, -97.6050646 |
| Land area | 1,115.9 sq miles(2,890.1 km²) |
Map of Williamson county, Texas with ZIP codes
Cities and Communities in Williamson County
Compare the largest cities in Williamson County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
| City | Population | Median incomeHousehold | ZIP codes |
|---|---|---|---|
| Round Rock | 119,468 | $107,677 | 6ZIPs |
| Cedar Park | 77,595 | $129,545 | 2ZIPs |
| Georgetown | 67,176 | $95,062 | 4ZIPs |
| Leander | 59,202 | $139,048 | 3ZIPs |
| Hutto | 27,577 | $118,834 | 1ZIPs |
| Taylor | 16,267 | $75,508 | 1ZIPs |
| Liberty Hill | 3,646 | $115,096 | 1ZIPs |
| Jarrell | 1,753 | $111,333 | 1ZIPs |
| Bartlett | 1,633 | $67,438 | 1ZIPs |
| Granger | 1,183 | $73,145 | 1ZIPs |
| Florence | 1,171 | $78,750 | 1ZIPs |
| Thrall | 816 | $76,094 | 1ZIPs |
| Weir | 699 | — | 1ZIPs |
| Coupland | 289 | — | 1ZIPs |
| Schwertner | 26 | — | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Williamson County
Review the most populated postal areas across Williamson County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 78613 | Cedar Park | $125,487 | 89,279 |
| 78641 | Leander | $135,024 | 83,426 |
| 78665 | Round Rock | $117,240 | 61,577 |
| 78664 | Round Rock | $85,919 | 60,287 |
| 78681 | Round Rock | $136,215 | 57,503 |
| 78628 | Georgetown | $125,635 | 40,378 |
| 78626 | Georgetown | $100,431 | 39,935 |
| 78634 | Hutto | $114,426 | 37,951 |
| 78633 | Georgetown | $100,936 | 27,736 |
| 78642 | Liberty Hill | $132,958 | 20,385 |
| 76574 | Taylor | $78,568 | 19,366 |
| 78645 | Leander | $113,008 | 14,051 |
| 76537 | Jarrell | $98,199 | 10,943 |
| 76527 | Florence | $81,574 | 4,688 |
| 76530 | Granger | $106,250 | 2,654 |
| 76511 | Bartlett | $69,286 | 2,451 |
| 76578 | Thrall | $105,063 | 1,817 |
| 78615 | Coupland | $80,938 | 1,694 |
| 78674 | Weir | — | 287 |
| 76573 | Schwertner | — | 26 |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS