The DeKalb County Free Fall Fair offers National Main Stage Entertainment, a Midway, the best fair Food Vendors and one of the largest Merchant’ tents around, 4-H competitions, parades and so much more! The DeKalb County Fair is one of the largest Street Fairs in the state, has won many honors, and is truly a “FREE” event! Join us every year for the fair week beginning on the 4th Monday each September. Click here for this year’s calendar event and schedule. The DeKalb County Free Fall Fair is an annual fair that takes place in Auburn, Indiana.  There’s something for everyone at America’s Family Reunion.