Le Puiset (French pronunciation: [lə pɥizɛ]) is a former commune in the Eure-et-Loir department in northern France.

[2] The name Le Puiset comes from Latin puteus, pit or cistern, whence French puits, well.

In medieval sources, its name is given as Puteolum, Puteacum, Pusiacum, Puisiacum or Pusatum in Latin and as Puisat or Puysiax (among others) in French.

The lords descended from the counts of Breteuil, and often also held the position of viscount of Chartres.

They participated in the Norman Conquest and the crusades of the 12th century, and were cousins of the dynasty of the Kings of Jerusalem.