Kailua-Kona is an unincorporated community and census-designated place (CDP) in Hawaii County, Hawaii, United States. It’s most commonly referred to simply as Kona, but also as Kona Town, and occasionally as Kailua, thus its less frequent use. Kailua-Kona is the second-largest settlement on the island of Hawaii and the largest on the island's west side, where it is the center of commerce and the tourist industry. Kailua-Kona is served by Kona International Airport, just to the north in the adjacent CDP of Kalaoa. The population was 19,713 at the 2020 census, up from 11,975 at the 2010 census.

Hawaii County is a county in the U.S. state of Hawaii in the Hawaiian Islands. It is coextensive with the Island of Hawaii, often called the "Big Island" to distinguish it from the state as a whole. The 2020 Census population was 200,629. The county seat is Hilo. There are no incorporated cities in Hawaii County. The Hilo Micropolitan Statistical Area includes all of Hawaii County. Hawaii County has a mayor–council form of government. In terms of geography, Hawaii County is the most expansive county in the state and the most southerly county in the United States.