Kaunakakai, HI has a population of 3,729 and is the 7,766th largest city in the United States. The population density is 291 per sq mi which is 128% higher than the Hawaii average and 221% higher than the national average. The median age in Kaunakakai is 41 which is approximately 7% higher than the Hawaii average of 39. In Kaunakakai, 60% of the population over 15 years of age are married, 81% speak English and 0% speak Spanish. 68% of Kaunakakai residents were born in Hawaii, 15% were born out of state, 2% were born outside of the United States and 16% were foreign born.