Olabarrieta is a Basque surname. Notable people with the surname include: Aingeru Olabarrieta (born 2005), Spanish footballer Amaia Olabarrieta (born 1982), Spanish footballer Esteban Echevarría Olabarrieta (1923–1987), Spanish footballer Maite Aranburu Olabarrieta, Spanish Basque politician Maitane Olabarrieta, Spanish and American oceanographer