Del Mar Fair Theme 2025. A low cost, high value design & manufacturing show for the electronics, medical and biotech industries. 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 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. With the 2024 san diego county fair approaching this year with a โletโs go retroโ theme, the del mar fairgrounds board of directors voted april 9 to approve the themes for the following two years.