St Peter's, known officially as Saint Pierre du Bois, is a parish in Guernsey. It is the centre for the Guernsey Western Parishes which includes Torteval, St Saviour's and the Forest.

The Bailiwick of Guernsey includes the island of Guernsey and other islands such as Alderney, Sark, Herm, Jethou, Brecqhou, and Lihou. Each parish was established, probably in the 11th century, as a religious area, each having its parish church. Administratively each parish is now administered by an elected council known as a Douzaine.