Pulau Senang is an 81.7-hectare coral island in the Republic of Singapore, about 13 kilometres off the southern coast of Singapore Island. Along with Pulau Pawai and Pulau Sudong, it is used as a military training area for live-fire exercises. Pulau Senang is best known in the history of Singapore as a penal settlement experiment that failed after only three years, when a riot against the guards broke out in 1963, killing three officers.