Until 1 January 2007, Maribo was also a municipality (Danish, kommune) in the former Storstrøm County. The municipality, which included the islands of Askø ("Ash Island") and Lilleø ("little Island") in the Rågø Sound, covered an area of 154 km², and had a total population of 11,098 (2005). Its last mayor was Liljan Køcks, a member of the Socialist People's Party (Socialistisk Folkeparti) political party.
