Royal, IA has a population of 415 and is the 20,665th largest city in the United States. The population density is 1,407 per sq mi which is 2475% higher than the Iowa average and 1453% higher than the national average. The median age in Royal is 37 which is approximately 3% lower than the Iowa average of 38. In Royal, 54% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 79% of Royal residents were born in Iowa, 21% were born out of state, 0% were born outside of the United States and 0% were foreign born.