V roku 1816 bola založená osada Ross 's Landing ako centrum obchodu s čerokézskymi Indiánmi. V roku 1838, po vysídlení Indiánov, bolo mesto premenované na Chattanooga.
As of the 2020 census, the population was 1,290,188. It is the fifth-most populous county in Texas. Its county seat and most populous city is Austin, [1 ] the state's capital.