Dublin, CA has a population of 54,523 and is the 739th largest city in the United States. The population density is 3,579 per sq mi which is 1440% higher than the California average and 3851% higher than the national average. The median age in Dublin is 37 which is approximately 2% higher than the California average of 36. In Dublin, 64% of the population over 15 years of age are married, 60% speak English and 5% speak Spanish. 49% of Dublin residents were born in California, 18% were born out of state, 1% were born outside of the United States and 32% were foreign born.