Festival

Contra Costa County Fair

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Usually May · next dates not announced

Annual county fair; May 14–17, 2026. The operator says it returns in May 2027.

Out of season· Contra Costa County Fair

Hours: Next fair: May 2027 (not confirmed by the organiser). 2026 edition was May 14–17.
Address: 1201 West 10th St., Antioch, CA 94509

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