Hawaii County is a county in the U.S. state of Hawaii in the Hawaiian Islands. It is coterminous with the Island of Hawaii, often called the "Big Island" to distinguish it from the state as a whole. As of the 2010 Census the population was 185,079. The county seat is Hilo. There are no incorporated cities in Hawaii County (see Hawaii Counties). The Hilo Micropolitan Statistical Area includes all of Hawaii County. Hawaii County has a mayor–council form of government. Hawaii County is the largest county in the state in terms of geography.