Don Juan Ortega y Montañés (also Juan de Ortega Cano Montañez y Patiño) (July 3, 1627 in Siles, Spain – December 16, 1708 in Mexico City) was a Roman Catholic bishop and colonial administrator in Guatemala and New Spain. He was successively bishop of Durango (1670 to 1681), of Guatemala (1681 to 1684) and of Michoacán (1684 to March 24, 1700), and then archbishop of Mexico (June 21, 1700 to December 16, 1708). He also served as interim viceroy of New Spain from February 27, 1696 to December 18, 1696 and again from November 4, 1701 to November 27, 1702.
Ortega y Montañés was a native of Cartagena. Some sources give a different birth date: June 23, 1627. He studied at Cartagena, at Málaga, and at Alcalá de Henares, where he graduated with a doctorate in jurisprudence. He was named inquisitor for New Spain, and it was there that he entered the service of the Church. He was bishop of Durango, then Guatemala, then Michoacán (Valladolid). He was known for his opposition to clerical abuse and arbitrariness, and also for his support of simple happiness and poverty among the clergy. He had also a reputation for charity, concern for the parishioners, and energy in his work.
In February 1696 he was named interim viceroy of New Spain, to succeed Gaspar de la Cerda, 8th Count of Galve.
One of the first challenges of his administration was the suppression of an uprising of university students. On March 27, 1696 they tried to burn the scaffold in the Plaza de Armas, which they saw as "an annoying manifestation of the power of the monarchy." This caused great alarm in Mexico City. The constables broke up the demonstration, arresting a youth named Francisco González de Castro. The students tried to rescue him as he was being escorted to jail, pelting the constables with rocks.