Wailea, HI has a population of 5,833 and is the 5,856th largest city in the United States. The population density is 784 per sq mi which is 515% higher than the Hawaii average and 765% higher than the national average. The median age in Wailea is 55 which is approximately 44% higher than the Hawaii average of 39. In Wailea, 69% of the population over 15 years of age are married, 89% speak English and 1% speak Spanish. 20% of Wailea residents were born in Hawaii, 61% were born out of state, 1% were born outside of the United States and 18% were foreign born.