Vallejo, CA has a population of 119,644 and is the 232nd largest city in the United States. The population density is 3,898 per sq mi which is 1577% higher than the California average and 4203% higher than the national average. The median age in Vallejo is 38 which is approximately 6% higher than the California average of 36. In Vallejo, 48% of the population over 15 years of age are married, 63% speak English and 18% speak Spanish. 54% of Vallejo residents were born in California, 16% were born out of state, 2% were born outside of the United States and 27% were foreign born.