Graton, CA has a population of 1,665 and is the 12,099th largest city in the United States. The population density is 1,054 per sq mi which is 354% higher than the California average and 1064% higher than the national average. The median age in Graton is 43 which is approximately 19% higher than the California average of 36. In Graton, 50% of the population over 15 years of age are married, 78% speak English and 19% speak Spanish. 61% of Graton residents were born in California, 23% were born out of state, 2% were born outside of the United States and 13% were foreign born.