Kalaheo, HI has a population of 5,099 and is the 6,378th largest city in the United States. The population density is 1,457 per sq mi which is 1044% higher than the Hawaii average and 1508% higher than the national average. The median age in Kalaheo is 40 which is approximately 4% higher than the Hawaii average of 39. In Kalaheo, 54% of the population over 15 years of age are married, 79% speak English and 0% speak Spanish. 51% of Kalaheo residents were born in Hawaii, 31% were born out of state, 0% were born outside of the United States and 18% were foreign born.