Captain Cook is a census-designated place in Hawai?i County, Hawai?i, 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.