The Yser is a river that rises in French Flanders, enters the Belgian province of West Flanders and flows through the Ganzepoot and into the North Sea at the town of Nieuwpoort.

Nieuwpoort is a city and municipality located in Flanders, one of the three regions of Belgium, in the province of West Flanders. The municipality comprises the town of Nieuwpoort proper, as well as Ramskapelle and Sint-Joris. On 1 January 2008, Nieuwpoort had a total population of 11,062. Its land area is 31.00 km² which gives a population density of 350 inhabitants per km². The current mayor of Nieuwpoort is Geert Vanden Broucke (CD&V)