Heavily favored Democratic party candidate Jim Kenney won.

[2] Incumbent Democratic party Mayor Michael Nutter could not run for re-election to a third consecutive term due to term limits in the city's home rule charter.

[3] Registered Democrats hold a formidable 7-to-1 ratio over registered Republicans in Philadelphia, giving Democratic candidates a distinct advantage in citywide elections.

[5] Democrats nominated Jim Kenney, a member of the Philadelphia City Council, as their party's nominee.

Kenney won the primary in a landslide with 55.83% of the vote, defeating a crowded field of five other Democratic candidates, including Anthony H. Williams and former District Attorney Lynn Abraham.