梅桑西（法语：Messancy, 德语：Metzig, 卢森堡语：Miezeg, 瓦龙语：Messanceye）是位于比利时卢森堡省的一座城市，人口7,466人（2006年）。

Messancy (German: Metzig, Luxembourgish: Miezeg, Walloon: Messanceye) is a Walloon municipality of Belgium located in the province of Luxembourg. On 1 January 2007 the municipality, which covers 52.43 km², had 7,466 inhabitants, giving a population density of 142.4 inhabitants per km².