West Lake Hills (locally referred to as "Westlake") is a city in Travis County, Texas, United States. The population was 3,063 at the 2010 census. The city developed rapidly in the 1970s and 1980s on the south side of the Colorado River. According to the United States Census Bureau, the city has a total area of 3.7 square miles (9.6 km2).
It is a suburb of Austin, located just west of central Austin.
At the 2000 census there were 3,116 people in 1,143 households, including 873 families, in the city. The population density was 835.7 people per square mile (322.5/km2). There were 1,185 housing units at an average density of 317.8 per square mile (122.7/km2). The racial makeup of the city was 95.60% White, 0.29% African American, 0.29% Native American, 1.28% Asian, 0.71% from other races, and 1.83% from two or more races. Hispanic or Latino of any race were 3.85%.
Of the 1,143 households 40.0% had children under the age of 18 living with them, 69.0% were married couples living together, 5.2% had a female householder with no husband present, and 23.6% were non-families.