Saint Peter Port is the capital of Guernsey as well as the main port. The population in 2001 was 16,488. In Guernésiais and in French, historically the official language of Guernsey, the name of the town and its surrounding parish is St Pierre Port. The "port" distinguishes this parish from Saint Pierre Du Bois.
As well as being a parish, St. Peter Port is a small town consisting mostly of steep narrow streets and steps on the overlooking slopes. It is known that a trading post/town has existed here since before Roman times, the pre-Christian name of which has not survived into the modern era.
The post code for addresses in this parish starts with GY1.
People from St. Peter Port, were nicknamed "les Villais" (the townspeople) or "cllichards" in Guernésiais.