| Honorific-Prefix: | Most Reverend |
| Juan Ruiz de Villarán | |
| Bishop of Lugo | |
| Church: | Catholic Church |
| Diocese: | Diocese of Lugo |
| Term: | 1587–1591 |
| Predecessor: | Fernando Vellosillo Barrio |
| Successor: | Lorenzo Asensio Otaduy Avendaño |
| Death Date: | 18 March 1591 |
| Death Place: | Lugo, Spain |
Juan Ruiz de Villarán (died 18 March 1591) was a Roman Catholic prelate who served as Bishop of Lugo (1587–1591).[1]
On 22 June 1587, Juan Ruiz de Villarán was appointed during the papacy of Pope Sixtus V as Bishop of Lugo. He served as Bishop of Lugo until his death on 18 March 1591.