Sunset Hills is a city in south St. Louis County, Missouri, United States. The population was 8,496 at the 2010 census.
Sunset Hills is located at 38°32'8" North, 90°24'14" West (38.535570, -90.403759).
According to the United States Census Bureau, the city has a total area of 9.14 square miles (23.67 km2), of which 9.10 square miles (23.57 km2) is land and 0.04 square miles (0.10 km2) is water.
According to U.S. Geological Survey, the highest point in Sunset Hills is 650 feet above sea level.
As of the 2010 United States Census of 2010, there were 8,496 people, 3,424 households, and 2,422 families living in the city. The population density was 933.6 inhabitants per square mile (360.5/km2). There were 3,635 housing units at an average density of 399.5 per square mile (154.2/km2). The racial makeup of the city was 94.1% White, 2.3% Asian, 1.5% African American, 0.2% Native American, 0.4% from other races, and 1.4% from two or more races. Hispanic or Latino of any race were 1.6% of the population.
There were 3,424 households, of which 26.3% had children under the age of 18 living with them, 62.6% were married couples living together, 5.4% had a female householder with no husband present, 2.7% had a male householder with no wife present, and 29.3% were non-families. 25.8% of all households were made up of individuals, and 18.1% had someone living alone who was 65 years of age or older.