Juan Pérez de Lazarraga (Basque: Joan Perez Lazarraga; c. 1548 – 11 April 1605) was a Basque writer, who was born and died in Larrea, Álava. Lazarraga, member of a family of the lower nobility originating in Oñati, was the Lord of Larrea. He is known for his manuscript, discovered in 2004. The text, written in the previously unattested Alavese dialect of Basque, is of great importance to philologists and linguists.