Pedro Páez Jaramillo (Portuguese: Pêro Pais; 1564 – May 25, 1622) was a Spanish Jesuit missionary in Ethiopia. Páez is considered by many experts on Ethiopia to be the most effective Catholic missionary in Ethiopia. He is believed to be the first European to see and describe the source of the Blue Nile.

Páez was born in Olmeda de las Cebollas (now Olmeda de las Fuentes, near Madrid) only sixteen years before the union of the Spanish and the Portuguese crowns (1580-1640); that union would determine the span of Páez's missionary activity. He studied at Coimbra and, sent from Goa to Ethiopia as a missionary in 1589, he was held captive in Yemen for seven years, from 1590 to 1596, where he used his time to learn Arabic. During this period he had to travel through the Hadramaut and Rub'al Khali deserts, and tasted coffee in Mocha, being most probably the first European to undergo such experiences.

He finally arrived at Massawa in 1603, proceeded to Debarwa where he met the chief of the Portuguese in Ethiopia, John Gabriel on 11 May, and four days later had made his way to Fremona, the Jesuit base in Ethiopia. Unlike his predecessor, Andre de Oviedo, Paul Henze describes him as "gentle, learned, considerate of the feelings of others". When summoned to the court of the young Emperor (negusä nägäst) Za Dengel, his knowledge of Amharic and Ge'ez, as well as his knowledge of Ethiopian customs impressed the sovereign so much that Za Dengel decided to convert from the Ethiopian Orthodox Tewahido Church to Catholicism -- although Páez warned him not to announce his declaration too quickly. However, when Za Dengel proclaimed changes in the observance of the Sabbath, Páez retired to Fremona, and waited out the ensuing civil war that ended with the emperor's death.