Oud-Turnhout (Dutch pronunciation: [ˌʌu̯t ˈtʏrnɦʌu̯t]) is a municipality located in the Belgian province of Antwerp. The municipality only comprises the town of Oud-Turnhout proper. On January 1, 2006 Oud-Turnhout had a total population of 12,653. The total area is 38.80 km² which gives a population density of 326 inhabitants per km².
There are 3 parishes: Zwaneven in the east, St. Bavo in the centre and Oosthoven in the North. Zwaneven is in the upmarket residential area referred to as "De Lint", where many Dutch people live, fleeing high taxes and strict building regulations in the Netherlands. Houses here are easily priced €750,000 and over.