Notre-Dame-du-Sacré-Cœur-d'Issoudun is a parish municipality in the Lotbinière Regional County Municipality in the Chaudière-Appalaches region of Quebec, Canada. Its population is 869 as of the Canada 2011 Census. It is simply known as Issoudun, given the length of the official name.

Issoudun is a commune in the Indre department, administrative region of Centre-Val de Loire, France. It is also referred to as Issoundun, which is the ancient name.