In Philadelphia, 26 percent of residents in 2012 were young adults, ages 20 to 34. But in seven of the city's 46 zip codes, young adults made up at least 40 percent of all residents. Leading the way was zip code 19127, in Manayunk, where 59 percent of residents were young adults. Other areas with high concentrations of 18- to 34-year-olds were in Center City, University City, and Fairmount.
Click on the zip codes in the map below for more information.
SOURCES: Pew Charitable Trust analysis of U.S. Census Bureau data; Pew Philadelphia poll