Boonville, CA has a population of 860 and is the 16,105th largest city in the United States. The population density is 155 per sq mi which is 33% lower than the California average and 71% higher than the national average. The median age in Boonville is 32 which is approximately 11% lower than the California average of 36. In Boonville, 54% of the population over 15 years of age are married, 40% speak English and 59% speak Spanish. 56% of Boonville residents were born in California, 13% were born out of state, 0% were born outside of the United States and 30% were foreign born.