Orange County Fair 2025 Hours. The oc fair returns to the beautiful city of costa mesa, california from july 19th until august 18th, 2025. Enjoy the experience of tasting, shopping, and learning about japanese culture.
Enjoy the experience of tasting, shopping, and learning about japanese culture. One of the top ten largest fairs in the u.s., the oc fair has no shortage of rides, carnival games, animals, arts and crafts, beer, food,.