Clearlake Oaks, California, United States [CDP]; population was 2,419 in 1990; housing units was 1,791 in 1990; location is 39°1'N 122°40'W; land area is 2.91 square miles (1,861 acres); water area is 0.05 square miles (34 acres); FIPS code is 13966 [SourceCBP]