Travis County vs Williamson County
Two neighbouring counties in Texas, compared on population, size, income and housing. They share 64 mi of border.
Travis County
Texas
Williamson County
Texas
Both outlines are drawn at true relative size. Williamson County spans about 85.3 km at its widest.
Side by side
| Measure | Travis County | Difference | Williamson County |
|---|---|---|---|
| Population | 1,389,670 | +84.6% | 752,827 |
| Change since 2020 | 7.2% | -15.1 pp | 22.3% |
| Land area | 994.3 sq mi | -10.9% | 1,116 sq mi |
| Population density | 1,398 per sq mi | +107.1% | 675 per sq mi |
| Median household income | $99,611 | -10.5% | $111,340 |
| Median home value | $523,000 | +17.0% | $447,000 |
| Median age | 35.6 | -4.6% | 37.3 |
| Households | 583,747 | +131.3% | 252,323 |
| Housing units | 618,236 | +135.4% | 262,644 |
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026; US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. The difference column is computed here: the first county's figure against the second, expressed as a percentage of the second. The change-since-2020 row is the exception: two growth rates differ in percentage points (pp), not percent. Retrieved 30 August 2026.
What the numbers say
- Travis County holds about 1.8 times the population of Williamson County: 1,389,670 against 752,827.
- Williamson County covers more ground, at 1,116 square miles against 994.3.
- Travis County is the more crowded of the two, at 1,398 people per square mile against 675.
- Median household income is higher in Williamson County, by 11,729 dollars a year.
- Since 2020, Travis County has grown by 7.2% and Williamson County has grown by 22.3%.
- They share 64 mi of common border, which the Census Bureau publishes in its county adjacency file and which almost no other county reference presents.
Full pages
Want a different pair? Compare any two of the 3,144 US counties.
Rebuilt from source data 30 August 2026. How these figures are produced.