Tulelake (/ˈtuːlileɪk/ TOO-lee-layk) is a city in northeastern Siskiyou County, California, United States. The town is named after nearby Tule Lake. Its population is 902 as of the 2020 census, down from 1,010 from the 2010 census. Tulelake peace officers are authorized by state law, along with cooperation of the state of Oregon, to serve as and be recognized as peace officers within Malin, Oregon, along with the inverse being true for peace officers employed within Malin, wherein they are recognized as peace officers within Tulelake by the California Penal Code.