The office of the District Attorney of Philadelphia is the largest prosecutor's office in the state of Pennsylvania and oversees a jurisdiction that includes more than 1.5 million citizens of both the city and county of Philadelphia.

[1] The current District Attorney of Philadelphia is Larry Krasner.

The district attorney represents the Commonwealth of Pennsylvania and the City & County of Philadelphia in all criminal and other prosecutions.

[2] Prior to 1850, the functions of this office were performed by a deputy state attorney-general.

654 authorized the voters of each of Pennsylvania's counties to elect one person, of requisite legal background to serve as district attorney for a term of three years.