Maunaloa or Mauna Loa is a census-designated place in Maui County, Hawaiʻi, United States, in the western part of the island of Molokai. The population was 435 at the 2020 census. Maunaloa is located at 21°8′11″N 157°12′51″W / 21.13639°N 157.21417°W.