Summit, AZ has a population of 5,240 and is the 6,252nd largest city in the United States. The population density is 1,414 per sq mi which is 2360% higher than the Arizona average and 1461% higher than the national average. The median age in Summit is 31 which is approximately 18% lower than the Arizona average of 37. In Summit, 54% of the population over 15 years of age are married, 23% speak English and 77% speak Spanish. 49% of Summit residents were born in Arizona, 12% were born out of state, 2% were born outside of the United States and 37% were foreign born.