Fyns Amt
In the Middle Ages, when Denmark was divided into hundreds, the area of Ullerslev Municipality was under Vindinge Hundred. In 1662 counties were established, and Ullerslev came under Nyborg County. It merged with Tranekær County in 1793 to form Svendborg County. In the 1970 Danish Municipal Reform Svendborg County was merged with Odense County to form Funen County. After the 2007 municipal reform Funen County came under the Region of Southern Denmark.