Osoyoos ( , historically ) is the southern-most town in the Okanagan Valley in British Columbia between Penticton and Omak. Near the border with Washington state, the town is also adjacent to the Indian Reserve of the Osoyoos Indian Band. The origin of the name Osoyoos was the word sẁiẁs (pronounced "soo-yoos") 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. Also, a newer contingent of international visitors is supported by proximity to the Kelowna and Penticton Airports. A growing year-round retiree population is evidenced 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). Another 1,892 people surround the town within the "Okanagan-Similkameen A" area.