Lake Shastina is an unincorporated community and census-designated place (CDP) in Siskiyou County, California, United States. It is a residential community sited on the east side of the lake of the same name. The lake is a reservoir of the Shasta River. As of the 2020 census, Lake Shastina had a population of 2,401.
The community of Lake Shastina is north of Weed.
Lake Shastina first appeared as a census designated place in the 2020 U.S. census.