Sarnia Beach is a hamlet within the Rural Municipality of Sarnia No. 221 in the province of Saskatchewan, Canada. Demographics In the 2021 Census of Population conducted by Statistics Canada, Sarnia Beach had a population of 37 living in 18 of its 54 total private dwellings, a change of from its 2016 population of 15. With a land area of , it had a population density of in 2021. References Designated places in Saskatchewan Organized hamlets in Saskatchewan Sarnia No. 221, Saskatchewan Division No. 6, Saskatchewan