Pontorson is located 9 km from Mont Saint-Michel, 22 km from Avranches and 45 km from Granville.
Located in the middle of the bay of Mont Saint-Michel, Pontorson is a city divided by the Couesnon (one of the three rivers of the bay of Mont Saint-Michel)
Pontorson is "framed" by the Couesnon and over 10 km of marsh area to the south and more than 4 800 hectares of reclaimed land.
Pontorson Township and enjoy a mild oceanic climate and are protected by the bay of Mont Saint-Michel.
Its surrounding communities are: Huisnes-sur-Mer, Tanis, Macey, Vessey, Aucey-la-Plaine, Sougéal, Saint-Georges-de-Gréhaigne, Beauvoir, Le Mont-Saint-Michel.
The city was founded in the 12th century on a vow of William the Conqueror. Important stronghold at the gates of Brittany, Pontorson fortress was razed in 1623 by order of Louis XIII. Some vestiges remain from this period as the Notre-Dame, the hotel Guiscard Ménardière or former Hotel Dieu St. Anthony of Charity.
In 1973 the town merged with Ardevon, Beauvoir, Boucey, Cormeray, Curey, Moidrey and The Pas, who have kept the status of municipalities involved. Beauvoir has regained its independence in 1989. Located 9 km from Mont-Saint-Michel, Pontorson is inside the bay of Mont Saint-Michel, on the banks of the Couesnon, the heart of future major projects that will restore the island's Mount.