Austin Metro Area Counties

5 counties · 2.6 million people (2025) · 4,220 sq mi

The Austin metro area (officially the Austin-Round Rock-San Marcos, TX Metropolitan Statistical Area) has 5 counties in Texas, with 2,620,945 people in 2025. Travis County is the most populous.

Map of the 5 counties of the Austin metro area with county names and major cities
The 5 counties of the Austin metro area (yellow) with the largest cities. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).
PDF (Letter) 194 KBPNG (2400 px) 122 KB

The 5 counties of the Austin metro area

Sorted by population. 3 are central counties (the urban core); the others are outlying counties tied to it by commuting.

CountyCounty seatPopulation 2025Change since 2020Land area (sq mi)Type
Travis CountyAustin1,389,670+7.7%994Central
Williamson CountyGeorgetown752,827+23.6%1,116Central
Hays CountySan Marcos304,390+26.3%677Central
Bastrop CountyBastrop118,908+22.3%888Outlying
Caldwell CountyLockhart55,150+20.2%545Outlying

Printable map

The PDF is a vector file for Letter paper; the PNG is 2400 pixels wide. Both are free to use with a credit to WhichCounty.

County maps of Texas

Other metro areas

Sources