Tholen is a 25,000 people municipality in the southwest of the Netherlands. The municipality of Tholen takes its name from the town of Tholen, which is the largest population center in the municipality. The municipality consists of two peninsulas, formerly islands, the larger one on the south also called Tholen, the smaller one on the north called Sint Philipsland. The two are separated by the former strait, now bay, of Krabbenkreek.