Gillancourt

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

{{Infobox French commune

|name = Gillancourt

|commune status = Commune

|image = Gillancourt Mairie.jpg

|caption = The town hall in Gillancourt

|arrondissement = Chaumont

|canton = Châteauvillain

|INSEE = 52221

|postal code = 52330

|mayor = Damien Bonhomme{{cite web|title=Répertoire national des élus: les maires|url=https://www.data.gouv.fr/fr/datasets/r/2876a346-d50c-4911-934e-19ee07b0e503|publisher=data.gouv.fr, Plateforme ouverte des données publiques françaises|date=13 September 2022|language=fr}}

|term = 2020–2026

|intercommunality = CA Chaumont

|coordinates = {{coord|48.1617|4.9931|format=dms|display=inline,title}}

|elevation m = 328

|elevation min m =

|elevation max m =

|area km2 = 15.09

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

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

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

}}

Gillancourt ({{IPA|fr|ʒijɑ̃kuʁ}}) is a commune in the Haute-Marne department in north-eastern France.