Lanchy

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

{{Expand French|topic=geo|date=December 2008|Lanchy}}

{{Infobox French commune

|name = Lanchy

|commune status = Commune

|image = Lanchy (Aisne) mairie-école.JPG

|caption = The town hall and school of Lanchy

|image coat of arms =

|arrondissement = Saint-Quentin

|canton = Saint-Quentin-1

|INSEE = 02402

|postal code = 02590

|mayor = Xavier de Romance{{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 du Vermandois

|coordinates = {{coord|49.8272|3.0764|format=dms|display=inline,title}}

|elevation m = 98

|elevation min m = 84

|elevation max m = 94

|area km2 = 3.69

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

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

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

}}

Lanchy ({{IPA|fr|lɑ̃ʃi}}) is a commune in the Aisne department in Hauts-de-France in northern France.