Koksijde (Dutch pronunciation: [ˈkɔksɛidə] ⓘ; French: Coxyde [kɔksid]; West Flemish: Koksyde) is a town and a municipality in Belgium.

It is located on the North Sea coast in the southwest of the Flemish province of West Flanders.

The municipality comprises apart from Koksijde, the villages of Oostduinkerke, Saint-Idesbald and Wulpen.

The old town centre of Oostduinkerke is located more than one kilometre from the coastline as well, with Oostduinkerke-bad close to the sea.

The museum of the historical Ten Duinen Abbey is set in a modern building, explaining the religious and cultural importance of this abbey throughout history and showing the daily life of Cistercian monks from the early Middle Ages, beginning in 1107 till the death of the last monk in 1833.