Sonoma, CA has a population of 10,952 and is the 3,679th largest city in the United States. The population density is 3,992 per sq mi which is 1618% higher than the California average and 4306% higher than the national average. The median age in Sonoma is 51 which is approximately 43% higher than the California average of 36. In Sonoma, 58% of the population over 15 years of age are married, 86% speak English and 10% speak Spanish. 56% of Sonoma residents were born in California, 33% were born out of state, 1% were born outside of the United States and 10% were foreign born.