Mililani Town, HI has a population of 28,460 and is the 1,504th largest city in the United States. The population density is 7,097 per sq mi which is 5472% higher than the Hawaii average and 7733% higher than the national average. The median age in Mililani Town is 38 which is approximately equal to the Hawaii average of 39. In Mililani Town, 60% of the population over 15 years of age are married, 85% speak English and 2% speak Spanish. 68% of Mililani Town residents were born in Hawaii, 19% were born out of state, 4% were born outside of the United States and 8% were foreign born.