| Notre-Dame-du-Sacré-Cœur-d'Issoudun | |
| Other Name: | Issoudun |
| Settlement Type: | Parish municipality |
| Pushpin Map: | Canada Southern Quebec |
| Pushpin Label: | Issoudun |
| Pushpin Map Caption: | Location in southern Quebec |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | Region |
| Subdivision Name2: | Chaudière-Appalaches |
| Subdivision Type3: | RCM |
| Subdivision Name3: | Lotbinière |
| Established Title1: | Constituted |
| Established Date1: | January 4, 1909 |
| Leader Title: | Mayor |
| Leader Name: | Annie Thériault |
| Leader Title1: | Federal riding |
| Leader Name1: | Lotbinière— Chutes-de-la-Chaudière |
| Leader Title2: | Prov. riding |
| Leader Name2: | Lotbinière-Frontenac |
| Area Total Km2: | 60.60 |
| Area Land Km2: | 60.00 |
| Population Total: | 869 |
| Population As Of: | 2011 |
| Population Density Km2: | 14.5 |
| Population Blank1 Title: | Pop 2006-2011 |
| Population Blank1: | 9.4% |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 338 |
| Timezone: | EST |
| Utc Offset: | −5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −4 |
| Postal Code Type: | Postal code(s) |
| Postal Code: | G0S 1L0 |
| Area Code: | 418 and 581 |
| Blank Name: | Highways |
| Blank Info: | |
Notre-Dame-du-Sacré-Cœur-d'Issoudun (pronounced as /fr/,) 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.
The name honours the origin of a group of Missionaries of the Sacred Heart who came to Quebec City in 1900, from Issoudun, France.
On August 11, 1957, Maritime Central Airways Flight 315 crashed near Issoudun, killing 79 people.
In the 2021 Census of Population conducted by Statistics Canada, Notre-Dame-du-Sacré-Coeur-d'Issoudun had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 60.32km2, it had a population density of in 2021.[1]