Royal Kunia, HI has a population of 14,424 and is the 2,921st largest city in the United States. The population density is 4,796 per sq mi which is 3665% higher than the Hawaii average and 5194% higher than the national average. The median age in Royal Kunia is 35 which is approximately 9% lower than the Hawaii average of 39. In Royal Kunia, 61% of the population over 15 years of age are married, 64% speak English and 2% speak Spanish. 47% of Royal Kunia residents were born in Hawaii, 17% were born out of state, 5% were born outside of the United States and 30% were foreign born.