Watsonville, CA has a population of 52,915 and is the 761st largest city in the United States. The population density is 7,912 per sq mi which is 3305% higher than the California average and 8633% higher than the national average. The median age in Watsonville is 30 which is approximately 18% lower than the California average of 36. In Watsonville, 51% of the population over 15 years of age are married, 24% speak English and 72% speak Spanish. 56% of Watsonville residents were born in California, 6% were born out of state, 1% were born outside of the United States and 37% were foreign born.