Waianae, HI has a population of 13,426 and is the 3,117th largest city in the United States. The population density is 2,506 per sq mi which is 1867% higher than the Hawaii average and 2666% higher than the national average. The median age in Waianae is 33 which is approximately 13% lower than the Hawaii average of 39. In Waianae, 49% of the population over 15 years of age are married, 81% speak English and 1% speak Spanish. 80% of Waianae residents were born in Hawaii, 8% were born out of state, 2% were born outside of the United States and 10% were foreign born.