蒙居克（法语：Montcuq，法语发音：[mɔ̃kyk]）是法国南部-比利牛斯大区洛特省的一个市镇，面积32.22平方公里，2009年人口为1294。

Montcuq is a former commune in the Lot department in south-western France, lying 25 kilometres (16 mi) outside Cahors. On 1 January 2016, it was merged into the new commune of Montcuq-en-Quercy-Blanc. Its residents are known as Montcuquois.

The town remains vibrant and a popular tourist destination. It still has a rich agricultural industry, and is known for its manufacture of meringues and gaufres de Saint Daumes waffles.