History The Clearlake post office opened in 1923, "Konocti" then Clearlake Highlands until incorporation in 1981 when the official name became City of Clearlake.
HIstory tHe clearlaKe Post oFfice openED in 1923 "KonoCtI" thEn CLeaRLake HIGhLanDs untIl InCORporaTIoN in 1981 When the OffiCiAl NamE becAmE cITy OF cleARLake.