 According to the 2010 United States Census, Westlake Village had a median household income of $112,083, with 3.9% of the population living below the federal poverty line.As of the census of 2000, there were 8,469 people, 3,270 households, and 2,491 families residing in the city.The population density was 1,605.9 inhabitants per square mile (620.1/km²).