Austin serves as the capital city of the U.S. state of Texas, situated in Central Texas within the greater Texas Hill Country. It functions as the county seat and most populous city of Travis County, with portions extending into Hays and Williamson counties. Geographically, it is the southernmost state capital in the contiguous United States, located approximately 80 miles from San Antonio along the I-35 corridor. The region features numerous lakes, rivers, and waterways, including Lady Bird Lake and Lake Travis on the Colorado River.

The area has been inhabited since at least 9200 BC, with evidence of Clovis culture and later Archaic period settlements. Spanish expeditions reached the Colorado River in 1709, and Catholic missions were briefly established in what is now Zilker Park in 1730. In 1839, the Texas Congress selected the site for the new capital, initially incorporating it as Waterloo before renaming it Austin in honor of Stephen F. Austin. The city was officially incorporated on December 27, 1839, following a survey by Edwin Waller that established its grid plan.

The city is defined by its rapid growth and diverse districts, including the downtown area based on the Waller Plan. Notable landmarks include the Texas State Capitol, Barton Springs, McKinney Falls, and Lake Walter E. Long. Austin is considered a Gamma + level global city and is home to the University of Texas at Austin. The urban landscape reflects a mix of government, education, and technology sectors, with a character often described as bohemian despite ongoing gentrification challenges.

Austin promotes itself as "The Live Music Capital of the World," hosting the annual South by Southwest festival and the long-running PBS series Austin City Limits. Residents embrace the unofficial slogan "Keep Austin Weird" to protect local businesses, while the city was historically known as the "City of the Violet Crown" for its sunset hues. The cultural scene includes a diverse population of musicians, tech workers, and students, alongside the recent addition of Austin FC, the city's first major professional sports team.

The population was 961,855 as of the 2020 census, making it the twelfth-most populous city in the United States. The economy has shifted from government and education to a center for technology, hosting headquarters for companies like Apple, Dell, and Google. Summers are long and hot, with temperatures frequently reaching triple digits, while winters are short with rare snowfall. The climate generally allows for year-round activities, though visitors should prepare for high heat indices between May and September.