Until January 1, 2007 Ørbæk municipality was a municipality (Danish, kommune) in the former Funen County on the east coast of the island of Funen in central Denmark. The municipality covered an area of 138 km², and had a total population of 6,886 (2005). Its last mayor was Kaj Refslund, a member of the Venstre (Liberal Party) political party. The main town and the site of its municipal council was the town of Ørbæk. Other towns in the municipality were Måre, Refsvindinge, Svindinge, Tårup, and Tårup Strand.
Ørbæk municipality ceased to exist as the result of Kommunalreformen ("The Municipality Reform" of 2007). It was merged with Nyborg and Ullerslev municipalities to form a new Nyborg municipality. This created a municipality with an area of 278 km² and a total population of 31,009 (2005). The new municipality belong to Region of Southern Denmark.