Châteaufort, Yvelines

{{Infobox French commune

|name = Châteaufort

|commune status = Commune

|image coat of arms = Blason ville fr Châteaufort (Yvelines).svg

|image = Châteaufort 78 Mairie.jpg

|caption = Town hall

|arrondissement = Versailles

|canton = Maurepas

|INSEE = 78143

|postal code = 78117

|mayor = Patrice Berquet{{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=4 May 2022|language=fr}}

|term = 2020–2026

|intercommunality = CA Versailles Grand Parc

|coordinates = {{coord|48.7322|2.0922|format=dms|display=inline,title}}

|elevation m = 150

|elevation min m = 86

|elevation max m = 164

|area km2 = 4.88

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

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

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

}}

Châteaufort ({{IPA|fr|ʃɑtofɔʁ}}) is a commune in the Yvelines department in Île-de-France in north-central France.

It is located {{convert|9|km|mi|abbr=on}} south of Versailles, and {{convert|27|km|mi|abbr=on}} southwest of Paris.

Châteaufort inhabitants are named Castelfortain.

Image:Châteaufort 78 Église.jpg

The commune is named after the existence of three fortified castles during the Middle Ages; indeed, château fort means "fortified castle" in French.

On August 19, 1913, ahead of the Châteaufort aerodrome, the French aviator Adolphe Pégoud became the first man to jump from a plane using a parachute. The jump was made from a Blériot plane 200 m above the ground.

In the 20th century, Farman Aviation Works was headquartered in Châteaufort.