Osoyoos ( historically ) is a town in the southern part of the Okanagan Valley in British Columbia near the border with Washington state, between Penticton and Omak. The town is also adjacent to the Indian Reserve of the Osoyoos Indian Band. The origin of the name Osoyoos was the word suius meaning "narrowing of the waters" in the local Okanagan language (Syilx'tsn). The "O-" prefix is not indigenous in origin and was attached by settler-promoters wanting to harmonize the name with other O-names in the Okanagan Country (Oliver, Omak, Oroville, Okanogan). There is one local newspaper, the Osoyoos Times.
The town’s population of 4,845 swells in the summer months with visitors from elsewhere in British Columbia and neighboring Alberta, as well as elsewhere in Canada. There is also a newer contingent of international visitors, supported by proximity to the Kelowna and Penticton Airport. There is also a growing year-round retiree population as is evident by the predominance in the population of people over 50 years old and with the recent boom of condominium and suburban development (though somewhat thwarted by the 2008–09 economic downturn). There are another 1,892 people surrounding the town within the "Okanagan-Similkameen A" area.