科特瑟姆（荷兰语：Kortessem）是位于比利时林堡省部的一座城市，人口8,074人（2006年）。

Kortessem is a municipality located in the Belgian province of Limburg near Hasselt. On January 1, 2006, Kortessem had a total population of 8,074. The total area is 33.90 km² which gives a population density of 238 inhabitants per km².

The municipality consists of the following sub-municipalities: Kortessem, Guigoven, Vliermaal, Vliermaalroot, and Wintershoven.