Lahaina, HI has a population of 12,675 and is the 3,276th largest city in the United States. The population density is 1,629 per sq mi which is 1179% higher than the Hawaii average and 1698% higher than the national average. The median age in Lahaina is 36 which is approximately 7% lower than the Hawaii average of 39. In Lahaina, 50% of the population over 15 years of age are married, 65% speak English and 5% speak Spanish. 44% of Lahaina residents were born in Hawaii, 24% were born out of state, 2% were born outside of the United States and 31% were foreign born.