Mililani is a city located near the center of the island of Oʻahu in Honolulu County, Hawaiʻi, United States. The municipality is composed of two distinct census-designated places: Mililani Town and Mililani Mauka.
According to the 2020 census, Mililani Town has a population of 28,121 residents, while Mililani Mauka has a population of 21,075. Together, these areas form the primary residential and geographic components of the city.