Heimlich County Fair is a county fair which appears only in the Season 5 episode "The Perils of Polling".
When Bobbyv excitingly approaches Hank in the garage, he explains that there's a county fair being held where the "Route 15 meets the 42" and asks Hank to drive him and Luannevto the fair. Luanne informs Hank that there will be "20 acres of fun, and one acre of craft."
It is at the Heimlich County Fair, that Mitch, Rooks Epperson and Ted T. Gannaway make their appearances.