South Tucson, AZ has a population of 5,627 and is the 5,993rd largest city in the United States. The population density is 5,480 per sq mi which is 9431% higher than the Arizona average and 5948% higher than the national average. The median age in South Tucson is 38 which is approximately 3% higher than the Arizona average of 37. In South Tucson, 38% of the population over 15 years of age are married, 35% speak English and 63% speak Spanish. 60% of South Tucson residents were born in Arizona, 14% were born out of state, 0% were born outside of the United States and 26% were foreign born.