The median age in Staten Island, New York is 40.4, as per 2021 ACS 5-Year Estimates. Of the total population, 18.00% were under the age of 15, 18.89% aged 15 to 29, 46.83% aged 30 to 64, 14.35% aged 65 to 84, and 1.93% were 85 years of age and older.