Welcome to the Seneca County Fair Let the Good Times Grow! July 26 - August 1, 2021 Days Hours Minutes Seconds Thank you to our day sponsors 2020 SPONSORS: A Great Place for Friends and Family to Come Together... The 178th annual Seneca Fair has many new and exciting events planned to interest young and old alike! Enjoy the friendly competition and proud display of projects and products from exhibitors that have worked so hard to accomplish and complete. The Fair Office Will be Open for Entries July 6-11, 2020 For complete rules and regulations Read the 2020 Jr. Fair Book Download the Jr. Fair Book How to find us Join us at the Seneca County Fair! 100 Hopewell Avenue Tiffin, Ohio 44883 419-447-7888 Fair Office Hours: 9:00 a.m. to 5:00 p.m.