Papaikou, HI has a population of 1,198 and is the 14,042nd largest city in the United States. The population density is 824 per sq mi which is 547% higher than the Hawaii average and 809% higher than the national average. The median age in Papaikou is 43 which is approximately 12% higher than the Hawaii average of 39. In Papaikou, 60% of the population over 15 years of age are married, 80% speak English and 0% speak Spanish. 69% of Papaikou residents were born in Hawaii, 15% were born out of state, 0% were born outside of the United States and 16% were foreign born.