Westlake Village, CA has a population of 8,443 and is the 4,492nd largest city in the United States. The population density is 1,627 per sq mi which is 600% higher than the California average and 1696% higher than the national average. The median age in Westlake Village is 52 which is approximately 45% higher than the California average of 36. In Westlake Village, 68% of the population over 15 years of age are married, 86% speak English and 3% speak Spanish. 48% of Westlake Village residents were born in California, 35% were born out of state, 2% were born outside of the United States and 15% were foreign born.