Flassigny

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

{{Infobox French commune

|name = Flassigny

|commune status = Commune

|image = Flassigny Église Saint-Martin.JPG

|caption = The church in Flassigny

|arrondissement = Verdun

|canton = Montmédy

|INSEE = 55188

|postal code = 55600

|mayor = Pierre Guillaume{{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 = Pays de Montmédy

|coordinates = {{coord|49.4742|5.4417|format=dms|display=inline,title}}

|elevation m = 252

|elevation min m = 193

|elevation max m = 337

|area km2 = 6.66

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

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

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

}}

Flassigny ({{IPA|fr|flasiɲi}}) is a commune in the Meuse department in Grand Est in north-eastern France.