| Saint-Pierre-de-la-Rivière-du-Sud | |
| Settlement Type: | Parish municipality |
| Pushpin Map: | Canada Southern Quebec |
| Pushpin Map Caption: | Location in province of Quebec. |
| Coordinates: | 46.9167°N -108°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | Region |
| Subdivision Name2: | Chaudière-Appalaches |
| Subdivision Type3: | RCM |
| Subdivision Name3: | Montmagny |
| Established Title1: | Constituted |
| Established Date1: | July 1, 1855 |
| Leader Title: | Mayor |
| Leader Name: | Marie Eve Proulx |
| Leader Title1: | Federal riding |
| Leader Name1: | Montmagny—L'Islet— Kamouraska—Rivière- du-Loup |
| Leader Title2: | Prov. riding |
| Leader Name2: | Côte-du-Sud |
| Area Total Km2: | 91.60 |
| Area Land Km2: | 91.05 |
| Population Total: | 840 |
| Population As Of: | 2021 |
| Population Density Km2: | 9.2 |
| Population Blank1 Title: | Pop 2016-2021 |
| Population Blank1: | 7.4% |
| Population Blank2 Title: | Dwellings |
| Population Blank2: | 430 |
| Timezone: | EST |
| Utc Offset: | −5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −4 |
| Postal Code Type: | Postal code(s) |
| Postal Code: | G0R 4B0 |
| Area Code: | 418 and 581 |
| Blank Name: | Highways |
| Blank Info: | |
Saint-Pierre-de-la-Rivière-du-Sud is a parish municipality in Quebec.
In the 2021 Census of Population conducted by Statistics Canada, Saint-Pierre-de-la-Rivière-du-Sud had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 91.05km2, it had a population density of in 2021.[1]