Captain Cook is a census-designated place (CDP) in Hawaiʻi County, Hawaiʻi, in the United States, located in the District of South Kona. The community, within the land division of Kealakekua, is so named because the post office for the area was located in the Captain Cook Coffee Co. during the early 1900s. As of the 2010 census the CDP population was 3,429, up from 3,206 at the 2000 census.
Captain Cook is located on the west side of the island of Hawaii at 19°29′54″N 155°54′15″W (19.498211, -155.904275). It is bordered to the north by Kealakekua and to the south by Honaunau-Napoopoo. Hawaii Route 11, part of the Hawaii Belt Road, passes through the community, leading north 12 miles (19 km) to Kailua-Kona and south 47 miles (76 km) to Naalehu. Hawaii Route 160 diverges from Route 11 in Captain Cook, leading south by a winding road 4 miles (6 km) to Napoopoo on Kealakekua Bay.
According to the United States Census Bureau, the Captain Cook CDP has a total area of 12.9 square miles (33.3 km2), all of it land.
Most of Captain Cook lies between the 800-foot (240 m) and 2,000-foot (610 m) elevation, which makes it ideal as a coffee-growing region. It sits on the top of an ancient fault which created the famous Kealakekua Bay.