Tulelake is a city in Siskiyou County, California, United States. It is named after the nearby Tule Lake. The population was 1,010 at the 2010 census, down from 1,020 at the 2000 census.
Tulelake is located at 41°57′15″N 121°28′33″W / 41.95417°N 121.47583°W / 41.95417; -121.47583 (41.954029, -121.475906).
According to the United States Census Bureau, the city has a total area of 0.4 square miles (1.1 km²), 99.42% of it land and 0.58% of it water.