| Castle Island | |
| Official Name: | Summer Village of Castle Island |
| Settlement Type: | Summer village |
| Pushpin Map: | Alberta |
| Pushpin Label Position: | none |
| Pushpin Map Caption: | Location of Castle Island in Alberta |
| Pushpin Mapsize: | 220 |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | Alberta |
| Subdivision Type3: | Census division |
| Subdivision Name3: | No. 13 |
| Government Type: | Municipal incorporation |
| Leader Title: | Mayor |
| Leader Name: | Ian Kupchenko |
| Leader Title1: | Governing body |
| Leader Name1: | Castle Island Summer Village Council |
| Area Footnotes: | (2021) |
| Area Land Km2: | 0.05 |
| Population As Of: | 2021 |
| Population Total: | 15 |
| Population Density Km2: | 278.8 |
| Timezone: | MST |
| Utc Offset: | −7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | −6 |
| Coordinates: | 53.708°N -114.3407°W |
Castle Island is a summer village in Alberta, Canada. It is located on a small island on Lac Ste. Anne, close to the mouth of the Sturgeon River.
Originally known as "Constance Island", this island was the site chosen by Indian Agent, Charles de Caze, for an impressive summer home. The island later became known as "Castle Island".[1]
In the 2021 Census of Population conducted by Statistics Canada, the Summer Village of Castle Island had a population of 15 living in 9 of its 18 total private dwellings, a change of from its 2016 population of 10. With a land area of, it had a population density of in 2021.[2]
In the 2016 Census of Population conducted by Statistics Canada, the Summer Village of Castle Island had a population of 10 living in 7 of its 19 total private dwellings, a change from its 2011 population of 19. With a land area of 0.05km2, it had a population density of in 2016.[3]