Saint-Maulvis (French pronunciation: [sɛ̃ molvi]; Picard: Saint-Meuvi) is a commune in the Somme department in Hauts-de-France in northern France.

The commune is situated some 12 miles (19 km) south of Abbeville, on the D96 and D187 roads.

An important headquarters of the Order of Saint John existed here as early as 1179.

At the time of the Hundred Years War, in 1350, the village was totally burned down, except for the fortress sheltering the men-at-arms.

From that time, the income of the commanderie was greatly reduced, so that the Grand Prior of France, Guillaume de Mailloc, summoned a general chapter at Paris in 1357.