San Miguel, CA has a population of 3,214 and is the 8,457th largest city in the United States. The population density is 3,060 per sq mi which is 1217% higher than the California average and 3278% higher than the national average. The median age in San Miguel is 42 which is approximately 17% higher than the California average of 36. In San Miguel, 74% of the population over 15 years of age are married, 91% speak English and 0% speak Spanish. 61% of San Miguel residents were born in California, 27% were born out of state, 4% were born outside of the United States and 9% were foreign born.