San Pablo, CA has a population of 29,991 and is the 1,431st largest city in the United States. The population density is 11,405 per sq mi which is 4808% higher than the California average and 12488% higher than the national average. The median age in San Pablo is 33 which is approximately 7% lower than the California average of 36. In San Pablo, 47% of the population over 15 years of age are married, 29% speak English and 53% speak Spanish. 46% of San Pablo residents were born in California, 8% were born out of state, 1% were born outside of the United States and 45% were foreign born.