| Official Name: | Waterhen 45 |
| Settlement Type: | First Nations reserve |
| Area Land Km2: | 19.54 |
| Population Total: | 476 |
| Population As Of: | 2021 |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Manitoba |
| Coordinates: | 51.954°N -99.596°W |
| Pushpin Map: | Canada Manitoba |
Waterhen 45 is a First Nations reserve belonging to the Skownan First Nation in the Canadian province of Manitoba.
Waterhen 45 is on the south shore of Waterhen Lake at the northern terminus of Provincial Road 276.[1] The Waterhen River flows into Waterhen Lake near the southern boundary of Waterhen 45.[1]
In the 2021 Census of Population conducted by Statistics Canada, Waterhen 45 had a population of 476 living in 172 of its 175 total private dwellings, a change of from its 2016 population of 373. With a land area of, it had a population density of in 2021.[2]