County Dossier

Williamson County

Texas | County

Population

672,688

Land Area

1,115.9 sq mi

Context

Metro

Geography

County silhouette

Land Area
1,115.9 sq mi
Water Area
16.0 sq mi
Water Share
1.4%

Terrain Layer

Open the county terrain view inside the atlas flow.

Terra Firma

Population & Housing

Population

672,688

Density
602.8 / sq mi
Households
252,323
Housing Units
262,644
Median Age
37.3 years

Income & Economy

Median Household Income

$111,340

GDP

$44.61B

Real GDP Change+6.0%
Per Capita Income
$53,505
Personal Income
$55.40B
Personal Income Per Capita
$76,156

Classification

RUCC 1
Metro

Counties in metro areas of 1 million population or more

Relief

Min

405 ft

Mean

756 ft

Max

1,373 ft

Provenance

GEOID 48491 ANSI 01384031
Latitude 30.64908 Longitude -97.60507
Canonical 2025 Gazetteer ACS ACS 2020-2024 5-year BEA BEA county 2024 release (2026-02-05) BLS BLS LAUS 2024 annual average USDA USDA RUCC 2023 USGS USGS 3DEP published as of 2026-03-23