The Bailiwick of Guernsey includes the island of Guernsey and other islands such as Alderney, Sark, Herm, Jethou, Brecqhou, and Lihou. Each parish is administered by an elected council known as a Douzaine.

The island of Guernsey is divided into ten parishes (the parish of Saint Anne, Alderney and the parish of Saint Peter, Sark are not generally included in the enumeration of parishes in the Bailiwick as the names are not of administrative significance

More information on the Wikipedia page [1].

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