Vaumarcus is a former municipality in the district of Boudry in the Canton of Neuchâtel in Switzerland . On 1 January 2018 the former municipalities of Bevaix , Saint-Aubin-Sauges , Gorgier , Vaumarcus, Montalchez and Fresens merged into the new municipality of La Grande-Béroche.

Vaumarcus was first mentioned in 1227 as Valmarcuel.

It was created in 1875 as a merger of Vaumarcus and Vernéaz , and was called Vaumarcus-Vernéaz until 1966.

Vaumarcus covers an area, as of 2009, of 1.8 square kilometers (0.69 sq mi). Of this area, 1.05 km2 (0.41 sq mi) or 59.0% is used for agricultural purposes, while 0.42 km2 (0.16 sq mi) or 23.6% is forested.