Northwest Philadelphia is a section of the city of Philadelphia. The official boundary is Stenton Avenue to the north, the Schuylkill River to the southwest, Northwestern Avenue to the northwest, Roosevelt Boulevard to the south, and Wister Street and Stenton Avenue to the east. The area is divided by Wissahickon Creek into two subsections, Upper Northwest and Lower Northwest Philadelphia. Upper Northwest are Germantown, Mount Airy (which itself is divided into east and west), Chestnut Hill, and Cedarbrook; Lower Northwest are Roxborough, Wissahickon, East Falls, and Manayunk. The area of Philadelphia west of the Schuylkill River is known as West Philadelphia. The Philadelphia Police Department patrols two districts located within Northwest Philadelphia. The two patrol districts serving No