In the Pa. Suburbs, Changing Demographics Favor Democrats

Since 2000, the Pennsylvania suburban counties of Philadelphia have become increasingly more diverse and better educated, trends that favored Democratic congressional candidates in this month’s elections.

Race and ethnicity

Level of education

Minority groups now make up nearly a quarter of suburban residents ...

Nearly half of all adults 25 or older have a college degree (bachelor’s degree or higher) ...

2000

14%

2000

35%

2010

20%

2010

41%

24%

46%

2017

2017

... and in suburban municipalities in which minorities were 24 percent or more of residents, Democratic congressional candidates received over two-thirds of the vote in 2018.

... and Democratic congressional candidates this year had a 20 percentage-point margin over Republicans in municipalities where

46 percent or more of adults have a college degree.

68%

60%

Democrats

Republicans

Democrats

Republicans

32%

40%

Race and ethnicity

Minority groups now make up nearly a quarter of suburban residents ...

2000

14%

2010

20%

24%

2017

... and in suburban municipalities in which minorities were 24 percent or more of residents, Democratic congressional candidates received over two-thirds of the vote in 2018.

68%

Democrats

Republicans

32%

Level of education

Nearly half of all adults 25 or older have a college degree (a bachelor’s degree or

higher) ...

2000

35%

2010

41%

46%

2017

... and Democratic congressional candidates this year had a 20 percentage-point margin over Republicans in municipalities where

46 percent or more of adults have a college degree.

60%

Democrats

Republicans

40%

SOURCES: County election boards; U.S. Census Bureau
JOHN DUCHNESKIE / Staff Artist