Mahinahina, HI has a population of 902 and is the 15,781st largest city in the United States. The population density is 135 per sq mi which is 6% higher than the Hawaii average and 49% higher than the national average. The median age in Mahinahina is 41 which is approximately 7% higher than the Hawaii average of 39. In Mahinahina, 73% of the population over 15 years of age are married, 84% speak English and 5% speak Spanish. 21% of Mahinahina residents were born in Hawaii, 63% were born out of state, 1% were born outside of the United States and 16% were foreign born.