Martinvast

{{About|the French commune|the World War II bunker|Brécourt}}

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

{{Infobox French commune

|name = Martinvast

|commune status = Commune

|image = Martinvast - Eglise Notre-Dame (choeur).jpg

|caption = Apse of the church of Notre-Dame

|arrondissement = Cherbourg

|canton = Cherbourg-en-Cotentin-3

|INSEE = 50294

|postal code = 50690

|mayor = Jacky Marie{{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|49.5967|-1.6628|format=dms|display=inline,title}}

|elevation m = 58

|elevation min m =

|elevation max m =

|area km2 = 10.31

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

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

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

}}

Martinvast ({{IPA|fr|maʁtɛ̃va}}) is a commune on the Cotentin peninsula in the Manche department in Normandy in north-western France.