Buda is a city in Hays County, Texas, United States. The population was 7,295 in 2010, up from 2,404 at the 2000 census. In 2018 the estimated population was 16,449. Buda is part of the Austin-Round Rock-San Marcos metropolitan statistical area and is one of Austin’s fastest growing suburbs. Residents of Buda are referred to as Budans.