 Sunday, Polk County Community Parade, Doc Dogs events, Super Demo Derby, and fireworks. Enjoy free stage headliners every day. For more information, go to PolkCountyFairFertileMN.com or call 218-945-6708. Polk County Fair, the home of family fun. Your Minnesota Twins are a different brand of baseball. Swung on and hit a ton. Deep right field, it's got a chance to fly, and it's gone. Here, this is pop. Swung on, hit the left field well, and that ball is out of air.