ʻAiea is a census-designated place located in the City and County of Honolulu, Hawaii, United States. As of the 2010 Census, the CDP had a total population of 9,338. ʻAiea is located at 21°23′9″N 157°55′51″W / 21.38583°N 157.93083°W. According to the United States Census Bureau, the CDP has a total area of 1.8 square miles, of which, 1.6 s…ʻAiea is a census-designated place located in the City and County of Honolulu, Hawaii, United States. As of the 2010 Census, the CDP had a total population of 9,338. ʻAiea is located at 21°23′9″N 157°55′51″W / 21.38583°N 157.93083°W. According to the United States Census Bureau, the CDP has a total area of 1.8 square miles, of which, 1.6 square miles of it is land and 0.1 square miles of it is water.