Hilo is a census-designated place and the largest city in Hawaii County, Hawaii, United States, which encompasses the Island of Hawaiʻi. The population was 43,263 according to the 2010 census.Hilo is the county seat of the County of Hawaiʻi and is in the District of South Hilo. The city overlooks Hilo Bay, at the base of two shield volcanoes, Mauna Loa, an active volcano, and Mauna Kea, a dormant volcano. Mauna Kea is the site of some of the world's... Show more

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