Vordingborg is a municipality in Region Zealand on the southeast coast of the island of Zealand (Sjælland) in south Denmark. The municipality includes the island of Masnedø, and covers an area of 615 km². It has a total population of 46,600 (2006).
The town of Vordingborg has a population of 9,282 inhabitants (2009).The ruins of Vordingborg Castle, the old royal castle which was built around 1364, is the town's most famous attraction. The only fully remaining part of the castle, the 26 meter tall Goose Tower (Gåsetårnet), is the symbol of the city.
Vordingborg town is at the seaside and has two small marinas. The local beach is well visited during the summer.