Sainte-Marie-du-Mont (French pronunciation: [sɛ̃t maʁi dy mɔ̃]) is a commune in the Manche department and in the region of Normandy in north-western France.

[4] Saint-Marie-du-Mont is located in the southeast of the Cotentin Peninsula, just north of the town of Carentan, and west of the Baie des Veys [fr], the outlet of the Douve and the Vire.

To the northeast of the commune is the National nature reserve of the Beauguillot domain [fr], protecting part of the marshes of Cotentin and Bessin.

After a heavy coastal bombardment by Allies just after midnight on 6 June 1944, the first American Paratroopers were dropped in dark early hours over occupied Normandy.

A thick fog bank and heavy flak from coastal guns forced pilots away from their targets and left paratroopers in unknown territory, some facing enemy fire while still in the air.