Williamson County, TX Demographics
Williamson County, TX is the 12th most populous of 254 counties in Texas, with 609,017 residents across 1,116 square miles. That is about 546 people per square mile.
At the 2020 census
| Population | 609,017 |
|---|---|
| Land area | 1,116 sq mi |
| Density | 546 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Williamson County compares to the US
We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: Williamson County, TX
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Williamson County, TX — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Williamson County, TX
Showing the 100 most populous of 135 — the rest are shown on the map.
Related places
Other counties nearby
Nearest counties
Metro areas containing Williamson County
About this page
This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.
Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.