Saint Martin de l'If () is a commune in the department of Seine-Maritime, northern France. The municipality was established on 1 January 2016 by merger of the former communes of Fréville, Betteville, La Folletière and Mont-de-l'If.Arrêté préfectoral 7 December 2015
Population Population data refer to the area corresponding with the commune as of January 2025.
See also Communes of the Seine-Maritime department
References