Cecilville (Karuk: íshirak ) is a small unincorporated community in Siskiyou County, California, United States. It is on the south fork of the Salmon River and was established when the area was settled by miners during the Gold Rush. It was formerly in Klamath County before that county was dissolved and the part of that county including Cecilville was annexed by Siskiyou County.
This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Cecilville has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.
Coordinates: 41°08′27″N 123°08′24″W / 41.14083°N 123.14000°W