Westley, CA has a population of 707 and is the 17,417th largest city in the United States. The population density is 1,958 per sq mi which is 743% higher than the California average and 2061% higher than the national average. The median age in Westley is 16 which is approximately 55% lower than the California average of 36. In Westley, 49% of the population over 15 years of age are married, 0% speak English and 100% speak Spanish. 39% of Westley residents were born in California, 14% were born out of state, 0% were born outside of the United States and 47% were foreign born.