Markel Irizar Aranburu is a Spanish former professional road racing cyclist, who rode professionally between 2004 and 2019 for the Euskaltel–Euskadi, Team RadioShack and Trek–Segafredo teams. During his professional career, Irizar took two victories – a stage win at the 2010 Tour du Poitou-Charentes and the general classification at the 2011 Vuelta a Andalucía.