Assens Municipality is a municipality (Danish, kommune) in Region of Southern Denmark on the west coast of the island of Funen in central Denmark. The municipality covers an area of 513 km² and a total population of 41,443 (2012). Its mayor from 1 January 2014 is Søren Steen Andersen, a member of the agrarian liberal Venstre political party.
The municipality's main town and the site of its municipal council is the city of Assens.
The island of Helnæs is connected to the municipality by road. Ferry service connects the municipality at the city of Assens to the island of Bågø.
On 1 January 2007 the former Assens municipality was merged with Glamsbjerg, Haarby, Tommerup, Vissenbjerg and Aarup municipalities to form a new Assens municipality. This was part of the Kommunalreformen ("The Municipal Reform" of 2007). The former Assens municipality was formed in 1966 by combining the even-then existing Assens Municipality with seven other smaller municipalities located around it.
Assens has a very talented Boys Choir consisting of 18 boys between the ages of 9 and 14 years and 17 young men and adult singers. The choir was established in 1856, however the tradition of using boys to sing in the church of Assens goes back to the 15th Century. This choir is the oldest of its type in Denmark. The Assens Boy Singers perform about 20 concerts a year in such countries as England, Germany, Switzerland, Holland, France, Spain, Italy, Sweden, Norway, The Czech Republic, Ireland, Brazil, Canada and the U.S. Most recently, they performed in Rome, Italy.