马尔尚（法语：Marchin）是位于比利时列日省部霍优河河谷的一座城市，人口3,722人（2006年）。

Marchin is a municipality of Belgium. It lies in the country's Walloon Region and Province of Liege. On January 1, 2006, Marchin had a total population of 5,114. The total area is 30.00 km² which gives a population density of 170 inhabitants per km².