Population overview
Williamson County is home to roughly 752,827 people, making up about 2.37% of the total population of Texas. Within the Central Texas region, it ranks #2 of 76 counties by population. The combination of 1,124 square miles of land and 752,827 residents yields a density of about 669.8 people per square mile — typical of suburban Texas, with a mix of subdivisions, commercial corridors, and remaining rural land.
How Williamson County compares
Compared with the other 253 Texas counties, Williamson County sits in the top 10% of the population distribution. It belongs to the upper tier of Texas counties — sizable enough to support diverse local services and infrastructure.
| Comparison | Population | vs Williamson |
|---|---|---|
| Williamson County | 752,827 | — |
| Central Texas region average | 81,016 | -89% |
| Texas county median | 18,916 | -97% |
| Largest in Texas (Harris) | 5,045,026 | +570% |
Neighboring county populations
Williamson County shares borders with 6 counties. Comparing population across an adjacent corridor often reveals commuting patterns, school-district pull, and economic gravity.
| County | Seat | Population | Density |
|---|---|---|---|
| Travis County | Austin | 1,389,670 | 1405.1 |
| Bell County | Belton | 402,248 | 379.8 |
| Bastrop County | Bastrop | 118,908 | 133.9 |
| Burnet County | Burnet | 57,015 | 57.3 |
| Milam County | Cameron | 26,258 | 25.8 |
| Lee County | Giddings | 18,729 | 29.8 |
Frequently asked questions
What is the population of Williamson County, Texas?+
Williamson County has an estimated population of 752,827 residents, based on the most recent U.S. Census data.
What is the population density of Williamson County?+
Williamson County has a population density of approximately 669.8 people per square mile across its 1,124 sq mi of land area — characteristic of a suburban county.
Where does Williamson County rank among Texas counties by population?+
Williamson County ranks #12 out of 254 Texas counties by total population, accounting for roughly 2.37% of the state's total population.
What is the most populous county near Williamson County?+
Among the 6 counties bordering Williamson, Travis County is the most populous with about 1,389,670 residents.
How is Williamson County's population measured?+
Population figures are sourced from the U.S. Census Bureau — the decennial census and annual American Community Survey (ACS) population estimates. See our methodology for full sourcing.