Maupertus-sur-Mer

{{Use dmy dates|date=August 2023}}

{{Infobox French commune

|name = Maupertus-sur-Mer

|commune status = Commune

|image = Église Saint-Martin de Maupertus-sur-Mer 01.JPG

|caption = The church of Saint-Martin

|arrondissement = Cherbourg

|canton = Val-de-Saire

|INSEE = 50296

|postal code = 50330

|mayor = Thierry Gervaise{{cite web|title=Répertoire national des élus: les maires|url=https://www.data.gouv.fr/fr/datasets/r/2876a346-d50c-4911-934e-19ee07b0e503|website=data.gouv.fr, Plateforme ouverte des données publiques françaises|date=2 December 2020|language=fr}}

|term = 2020–2026

|intercommunality = CA Cotentin

|coordinates = {{coord|49.6583|-1.4833|format=dms|display=inline,title}}

|elevation m = 119

|elevation min m = 0

|elevation max m = 152

|area km2 = 3.42

|population = {{France metadata Wikidata|population_total}}

|population date = {{France metadata Wikidata|population_as_of}}

|population footnotes = {{France metadata Wikidata|population_footnotes}}

}}

Maupertus-sur-Mer ({{IPA|fr|mopɛʁty syʁ mɛʁ}}, literally Maupertus on Sea) is a commune in the Manche department in Normandy in north-western France.