California is a home rule-class city in Campbell County, Kentucky, United States.

[5] The Elijah Herndon House in California is listed on the National Register of Historic Places in Campbell County.

Soprano Mary Hissem De Moss was born in California, Kentucky in 1871.

According to the United States Census Bureau, the city of California has a total area of 0.25 square miles (0.66 km2), all land.

[7] The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

Postal Service ZIP code area for California serves a population of approximately 4,000, almost all of whom live outside the city limits.