Kortessem (Dutch pronunciation: [ˈkɔrtəsɛm]; Limburgish: Kotsoeve) 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 km which gives a population density of 238 inhabitants per km.

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

Up until its destruction by a storm in 2009, Kortessem was the home of the Onzelievehereboom: a 1200-year-old oak.

Since 16 May 2014 Herman Van Rompuy is an honorary citizen.

Since 1990 the most famous party of Vlaanderen, Nacht van de Hoegaarden, was made in Kortessem

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  Dessener Castle, former residence of Field Marshal Guillaume de Lamboy, Baron of Cortesheim
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  Church of Saint Peter in Chains in Wintershoven, Kortessem
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  Castle Jongenbos, Vliermaalroot

• Media related to Kortessem at Wikimedia Commons
• Official website
• Kovok Kortessem: Volleybalteam
• kortessem.2link.be