St. David, AZ has a population of 1,709 and is the 11,950th largest city in the United States. The population density is 321 per sq mi which is 458% higher than the Arizona average and 254% higher than the national average. The median age in St. David is 35 which is approximately 5% lower than the Arizona average of 37. In St. David, 70% of the population over 15 years of age are married, 95% speak English and 5% speak Spanish. 55% of St. David residents were born in Arizona, 41% were born out of state, 4% were born outside of the United States and 1% were foreign born.