The Battle of the Yser was a battle of the First World War that took place in October 1914 between the towns of Nieuwpoort and Diksmuide, along a 35 km (22 mi) stretch of the Yser River and the Yperlee Canal, in Belgium. The front line was held by a large Belgian force, which halted the German advance in a costly defensive battle.

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)