How old is your neighbourhood? (Now without all the parks and cemeteries!) Darker areas in the map correspond to areas with high median age in New York. A quick glance reveals higher median age Riverdale, Bronx; far east side of Queens; Coney Island; and Upper East Side. Also notable is how low the median age is for the Columbia University areas within Morningside Heights, particularly 21.1 for the main campus. Hover over the areas to see the median age of the area.
Source: 2010 United States Census