Yes. Fairs are held from Crescent City on the Oregon border to Imperial County near the border with Mexico. According to the California Department of Food and Agriculture (CDFA) which manages State owned and operated fairgrounds and coordinates with other fairgrounds in the State, there are:
54 District Agricultural Associations (DAA's) owned and operated by the State.
2 DAA's were deactivated during fiscal year 1997/98, leaving 52 active DAA's.
23 County Fairs owned and operated by County government or not-for-profit organizations.
2 Citrus Fruit Fairs operated by not-for-profit organizations. A Citrus Fruit Fair is a specific type of fair focussed on citrus fruit.
The California Exposition and State Fair (Cal Expo) in Sacramento is a State agency.
A map of California fairs is available.