South Bruce is not to be confused with the Town of South Bruce Peninsula
| South Bruce | |
| Official Name: | Municipality of South Bruce |
| Settlement Type: | Municipality (lower-tier) |
| Flag Size: | 120x100px |
| Pushpin Map: | CAN ON Bruce#Canada Southern Ontario |
| Pushpin Mapsize: | 200px |
| Coordinates: | 44.0333°N -93°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | County |
| Established Title: | Settled |
| Established Title2: | Formed |
| Established Date2: | January 1, 1999 |
| Leader Title: | Mayor |
| Leader Name: | Mark Goetz |
| Leader Title1: | Federal riding |
| Leader Title2: | Prov. riding |
| Area Land Km2: | 486.86 |
| Population As Of: | 2021 |
| Population Total: | 5880 |
| Population Density Km2: | 12.1 |
| Utc Offset: | -5 |
| Utc Offset Dst: | -4 |
South Bruce is a municipality in Bruce County, Ontario, Canada.
South Bruce was created in 1999 as part of county-wide municipal restructuring. In 1998, the Township of Culross and the Village of Teeswater amalgamated to form the Township of Teeswater-Culross. Similarly, the Village of Mildmay joined with the Township of Carrick to form the Township of Mildmay-Carrick. The following year, both Mildmay-Carrick and Teeswater-Culross amalgamated again to form South Bruce, choosing Teeswater as the seat of the municipality.
South Bruce is one of two Ontario communities[1] being considered as a potential deep geological repository site for Canada's used nuclear fuel.
The two main population centres in South Bruce are Mildmay and Teeswater. Other communities within the municipal boundaries are Carlsruhe, Deemerton, Formosa and Salem.
In the 2021 Census of Population conducted by Statistics Canada, South Bruce had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of 486.86km2, it had a population density of in 2021.
Population trend prior to amalgamation: