Montmachoux

{{Infobox French commune

|name = Montmachoux

|commune status = Commune

|image = Montmachoux-FR-77-mairie-03.jpg

|caption = The town hall in Montmachoux

|coordinates = {{coord|48.3194|2.9939|format=dms|display=inline,title}}

|INSEE = 77313

|postal code = 77940

|arrondissement = Provins

|canton = Nemours

|mayor = Patrick Jacques{{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 = CC Pays de Montereau

|elevation min m = 96

|elevation max m = 155

|area km2 = 4.43

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

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

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

}}

Montmachoux ({{IPA|fr|mɔ̃maʃu|-|LL-Q150 (fra)-Xenophôn-Montmachoux.wav}}) is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France.