San Jacinto, CA has a population of 46,375 and is the 893rd largest city in the United States. The population density is 1,804 per sq mi which is 676% higher than the California average and 1891% higher than the national average. The median age in San Jacinto is 33 which is approximately 9% lower than the California average of 36. In San Jacinto, 51% of the population over 15 years of age are married, 57% speak English and 39% speak Spanish. 61% of San Jacinto residents were born in California, 16% were born out of state, 1% were born outside of the United States and 22% were foreign born.