Philadelphia is a city in Pennsylvania, and has a population of 1.526 million. It is the state's largest city.
During the early stages of the apocalypse, Dave, Tony and possibly others fled Philadelphia and attempted to reach Washington, D.C. due to hearing of a supposed refugee camp located there. However they never reached it due to the roads being too jammed with vehicles and they thus decided to move into the countryside to protect themselves. Moving from place to place they encountered many other survivor groups, each one having it's own claims about proposed solutions to the apocalypse and they also discovered that Fort Benning had been overrun. Eventually Dave and Tony became members of a group consisting of 30 other survivors known only as "the Living". The group was very mobile, never staying in one place for too long and were responsible for committing many atrocities, including raping two girls in front of their father. Dave and his group eventually arrived into Georgia at some point shortly before the events of "Nebraska".
- In a teaser trailer for the Film Series, a skyline of Philadelphia is seen, hinting at the possible setting of the movies.