San Diego Fair June 13, 2025 Calendar. The 2025 san diego county fair is open june 11 through july 6 (closed mondays & tuesdays.) the fair is open from 11am to 11pm each day. The “let's go retro” 2024 san diego county fair is set to take place at the del mar fairgrounds.
The san diego county fair is the wests largest fair. You’ll also avoid wait times at the gate and spend more time.