沙斯特尔（法语：Chastre）是位于比利时瓦隆-布拉班特省部的一座城市，人口6,734人（2006年）。

Chastre (Walloon: Tchåsse) is a municipality located in the Belgian province of Walloon Brabant. On January 1, 2006, Chastre had a total population of 6,734. The total area is 31.27 km² which gives a population density of 215 inhabitants per km².