Montcuq (French pronunciation: [mɔ̃kyk] or [mɔ̃ky]; Lengadocian: Montcuc) is a town and former commune in the Lot department in south-western France, lying 25 kilometres (16 mi) outside Cahors.

The town remains vibrant and a popular tourist destination, in part because its name is homophonic with mon cul, meaning my arse.

On 1 June 1212 Simon de Montfort took the castle after it had been deserted by its defenders, and gave it to Beaudouin, half-brother of the Count of Toulouse, an ally of the Crusaders.

English writer, comedian and musician Neil Innes lived in Montcuq during the last years of his life, before passing away there in December 2019.

In a well-known skit (1976), Daniel Prévost in the TV show Le petit rapporteur [fr] animated by Jacques Martin, visited the town and joked by asking the Montcuquois questions such as: "Is Montcuq well lit?