Rainbow City, AZ has a population of 1,181 and is the 14,135th largest city in the United States. The population density is 542 per sq mi which is 843% higher than the Arizona average and 499% higher than the national average. The median age in Rainbow City is 30 which is approximately 20% lower than the Arizona average of 37. In Rainbow City, 39% of the population over 15 years of age are married, 40% speak English and 4% speak Spanish. 88% of Rainbow City residents were born in Arizona, 10% were born out of state, 0% were born outside of the United States and 2% were foreign born.