Guldborgsund Municipality (Danish: Guldborgsund Kommune) is a kommune in the Region Sjælland in south-east Denmark, created on 1 January 2007 from six former municipalities on the two islands Lolland in the west and Falster in the east bordering the Guldborgsund strait. It covers an area of 903.15 km2 (2013) and has a total population of 59,119 (1 January 2026). Its neighboring municipalities are Lolland to the west and Vordingborg to the north. Its administrative seat is in the town of Nykøbing Falster. Its mayor as of 1 January 2022 is Simon Hansen, representing the Social Democrats.
The southernmost point in Denmark, Gedser Odde, is located in the municipality.
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History
On Monday January 1, 2007 Guldborgsund municipality was created as the result of Kommunalreformen ("The Municipal Reform" of 2007), consisting of the six former municipalities of Nykøbing Falster (located partly on the island of Falster and partly on Lolland (its Sundby section)), Nørre Alslev (Falster), Stubbekøbing (Falster), and Sydfalster (Falster) and two of the six former municipalities located on the island of Lolland: Sakskøbing and Nysted.



