the city and county of honolulu is the most densely populated of five counties within the state of hawaii, with a population of approximately 905,601(2007, u.s. census bureau). the city and county of honolulu was incorporated in april 30, 1907. it adopted a charter in 1959. it is organized as a mayor-council type of government in which there is a separation between legislative and executive functions. the mayor and council are located at honolulu hale, a landmark structure reflecting california-spanish architecture popular in the islands during the 1920's learn more about the city and county of honolulu at http://www.honolulu.gov/cchnl.htm#history.