Yountville, CA has a population of 2,991 and is the 8,834th largest city in the United States. The population density is 1,953 per sq mi which is 740% higher than the California average and 2056% higher than the national average. The median age in Yountville is 65 which is approximately 79% higher than the California average of 36. In Yountville, 62% of the population over 15 years of age are married, 84% speak English and 9% speak Spanish. 43% of Yountville residents were born in California, 43% were born out of state, 0% were born outside of the United States and 13% were foreign born.