| Official Name: | Dayman Island |
| Pushpin Map: | Canada British Columbia |
| Pushpin Map Caption: | Location of Dayman Island in British Columbia |
| Subdivision Type: | Country |
| Subdivision Name: | Canada |
| Subdivision Type1: | Province |
| Subdivision Name1: | British Columbia |
| Coordinates: | 48.9722°N -123.6875°W |
Dayman Island is a privately owned island located off the coast of British Columbia, Canada, beside Thetis Island and Hudson Island. It is about 24acres in size, and has a 2100square feet year-round main residence and a caretaker's residence.
Likely named after Dayman, an officer aboard HMS Thetis, 36-guns, on this station 1851–1853, under the command of Captain Augustus Leopold Kuper, CB. As Kuper Island was named in 1858 by Captain Richards, HMS Plumper, Dayman Island was possibly named at the same time, although not labeled on resulting Admiralty Chart 579. Psychedelic pioneer and government agent Al Hubbard owned the island from at least the 1950s until 1968.[1]