Oier Aizpurua Aranzadi (born 6 November 1977 in Zumaia) is a Spanish sprint canoer who competed in the early 2000s. He won three medals at the ICF Canoe Sprint World Championships with a silver (K-4 200 m: 2002) and two bronzes (K-4 200 m: 2003, K-4 500 m: 2002).