Olazábal is a Basque surname. Notable people with the surname include:
Tirso Olazábal Lardizábal (1842–1921), Spanish politician Juan Olazábal Ramery (1860–1937), Spanish politician Francisco Olazábal (1886–1937), Mexican Pentecostal evangelist José María Olazábal (born 1966), Spanish golfer Oier Olazábal (born 1989), Spanish footballer