Nanakuli, HI has a population of 12,042 and is the 3,412th largest city in the United States. The population density is 4,029 per sq mi which is 3063% higher than the Hawaii average and 4347% higher than the national average. The median age in Nanakuli is 30 which is approximately 21% lower than the Hawaii average of 39. In Nanakuli, 46% of the population over 15 years of age are married, 83% speak English and 1% speak Spanish. 85% of Nanakuli residents were born in Hawaii, 8% were born out of state, 2% were born outside of the United States and 4% were foreign born.