Diksmuide is a Belgian city and municipality in the Flemish province of West Flanders. The municipality comprises the city of Diksmuide proper and the former communes of Beerst, Esen, Kaaskerke, Keiem, Lampernisse, Leke, Nieuwkapelle, Oostkerke, Oudekapelle, Pervijze, Sint-Jacobs-Kapelle, Stuivekenskerke, Vladslo and Woumen.
Most of the area west of the city is a polder riddled with drainage trenches. The major economic activity of the region is dairy farming, producing the famous butter of Diksmuide.