Martijn Wydaeghe (born 1 September 1992) is a Belgian rallying co-driver. He is partnered with Thierry Neuville for Hyundai Motorsport in the World Rally Championship category.
Wydaeghe made his WRC debut at the 2013 Rallye de France-Alsace. He is set to co-drive with five-time runner-up Thierry Neuville, replacing compatriot Nicolas Gilsoul.