The Real World: Philadelphia is the 15th season of MTV's reality television series The Real World, which focuses on a group of diverse strangers living together for several months in a different city each season, as cameras follow their lives and interpersonal relationships. The Philadelphia installment began filming in April 2004, and premiered September 7 later that year. This was the fourth season to be filmed in the northeastern United States, after The Real World: New York in 1992, The Real World: Boston in 1997 and The Real World: Back to New York in 2001. The season premiere was watched by 3.3 million viewers.