| Cornwallis | |
| Official Name: | Rural Municipality of Cornwallis |
| Settlement Type: | Rural municipality |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Manitoba |
| Subdivision Type2: | Region |
| Leader Title: | Reeve |
| Leader Title1: | Councillors |
| Leader Title2: | Office location |
| Established Title1: | Incorporated |
| Established Date1: | December 22, 1883 |
| Area Total Km2: | 500.36 |
| Population Total: | 4,568 |
| Population As Of: | 2021 |
| Population Footnotes: | [1] |
| Population Density Km2: | auto |
| Coordinates: | 49.7981°N -99.8481°W |
| Timezone1: | CST |
| Utc Offset1: | -6 |
| Timezone1 Dst: | CDT |
| Utc Offset1 Dst: | -5 |
Cornwallis is a rural municipality located in the Canadian province of Manitoba. It surrounds the east, south and west sides of Brandon, Manitoba. Most of the land comprising the municipality is farmland, but it contains a few settlements. One of the larger settlements, Sprucewoods, sits at the north gate of Canadian Forces Base Shilo and contains a large portion of the municipal population. In the past, there has been friction between the community and the farming base that make up much of Cornwallis.
The municipality is divided into six wards, each represented by one councillor. The council is made up of the six councillors and the reeve, or head of council.
In the 2021 Census of Population conducted by Statistics Canada, Cornwallis had a population of 4,568 living in 1,704 of its 1,850 total private dwellings, a change of from its 2016 population of 4,506. With a land area of, it had a population density of in 2021.[1]