Koster is a village in Vordingborg Municipality, in the region of Zealand, Denmark. Koster lies at 5 m above sea level. The nearest city is Næstved, 40 km to the northwest. Beaches nearby: Rytsebæk (7.9 km), Hårbølle (10 km), Ulvshale (9.2 km). Among the landmarks around are Kong Asgers Høj (3.9 km), Klekkende Høj (4.7 km) and Farø Bridges (13.5 km). Among the natural features are Aborrebjerg (22 km) and Dronningestolen (23 km).