Welcome to the 2017 Polk County Fair in Osceola, NE Interested in a Polk County Fair Sponsorship? Click here for more information. Looking to rent the Ag Hall for your next event? Click here for more information. Fill out your More Than Games LLC family waiver form ahead of time! Return to PO Box 493 Osceola, NE 68651 OR firstname.lastname@example.org Tallest Corn Plant Contest – Click Here For More Information!!