Wahiawa, HI has a population of 17,696 and is the 2,446th largest city in the United States. The population density is 8,566 per sq mi which is 6626% higher than the Hawaii average and 9355% higher than the national average. The median age in Wahiawa is 39 which is approximately 2% higher than the Hawaii average of 39. In Wahiawa, 54% of the population over 15 years of age are married, 74% speak English and 1% speak Spanish. 61% of Wahiawa residents were born in Hawaii, 17% were born out of state, 3% were born outside of the United States and 19% were foreign born.