 According to the 2009 American Community Survey conducted by the U.S. Census Bureau, Staten Island had a population 491,730, of which 48.7% were males and 51.3% were females.Approximately 6.0% of the population was under five years of age, and 76.9% of the populace was over eighteen years of age.One-eighth (12.5%) of the population was over sixty-five years of age.