Tiburon, CA has a population of 9,170 and is the 4,203rd largest city in the United States. The population density is 2,047 per sq mi which is 781% higher than the California average and 2159% higher than the national average. The median age in Tiburon is 50 which is approximately 39% higher than the California average of 36. In Tiburon, 69% of the population over 15 years of age are married, 80% speak English and 4% speak Spanish. 34% of Tiburon residents were born in California, 41% were born out of state, 3% were born outside of the United States and 22% were foreign born.