Captain cook is located in Hawaii county Hawaii with a geographic area of 12.9 square miles. The total population in Captain cook is 4,361 with 53.5% male and 46.5% female. Children under age 5 represent 8.0% of the population, under age 18 equal 28.7% of the population and over age 65 is 21.1% of the population. The median household income is $76,799, per capita income is $28,420. There are a total of 1,121 housing units with 56.5% owner occupied. Education includes 17.5% of residents that are high school graduates and 34.6% with a bachelor's degree or higher. The average temperature in Captain cook in the summer is 85 degrees, and in the winter 78 degrees.