Juan de San Millán (1497 – 11 April 1578) was a Roman Catholic prelate who served as Bishop of León (1564–1578) and Bishop of Tui (1547–1564).
[1] Juan de San Millán was born in Barrionuevo, Spain.
[2][3] On June 1547, he was appointed during the papacy of Pope Paul III as Bishop of Tui.
[2] On 28 Jul 1564, he was appointed during the papacy of Pope Pius IV as Bishop of León.
[2] He served as Bishop of León until his death on 11 April 1578.