Papaikou is located in Hawaii county Hawaii with a geographic area of 1.5 square miles. The total population in Papaikou is 881 with 51.6% male and 48.4% female. Children under age 5 represent 7.4% of the population, under age 18 equal 27.9% of the population and over age 65 is 21.3% of the population. The median household income is $57,837, per capita income is $32,811. There are a total of 307 housing units with 74.9% owner occupied. Education includes 20.2% of residents that are high school graduates and 31.9% with a bachelor's degree or higher. The average temperature in Papaikou in the summer is 85 degrees, and in the winter 78 degrees.