Galarreta, also de Galarreta, is a Basque surname, connected with the village of Galarreta, Álava, Basque Country, Spain. It is prevalent in Peru and Spain.

Notable people with this surname include: Alberto Ruiz de Galarreta Mocoroa (1922–2019), Spanish historian Alfonso de Galarreta (born 1957), Spanish-Argentinian bishop Iñigo Ruiz de Galarreta (born 1993), Spanish footballer Luis Galarreta (born 1973), Peruvian politician

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