Juan Manuel Bilbao Azkarreta, also known as Jon Bilbao or Jon Bilbao Azkarreta (31 October 1914 – 23 May 1994) was a university instructor, a bibliographer, and an activist for Basque nationalism.
He compiled the bibliographic section of the Enciclopedia general ilustrada del PaÃs Vasco (1970), and the monumental Eusko-bibliographia: diccionario de bibliografÃa vasca (10 volumes, 1970–1981, with further supplements), which has been described as "one of the most significant reference works on Basque studies".