Juan Martínez de Jáuregui y Aguilar (also known as Juan Martínez de Jáuregui y Hurtado de la Sal) (24 November 1583 - 11 January 1641), Spanish poet, scholar and painter in the Siglo de Oro.
Juan Martínez de Jáuregui y Hurtado de la Sal was born and baptized in Seville, Andalusia. His parents were Miguel Martínez de Jáuregui, a hidalgo—which is an untitled Spanish nobleman—from La Rioja, and Doña Isabel de la Sal from Seville. He was the fifth of their ten children; the oldest became later commissioner (regidor) of Seville. The poet changed his second name (the one coming from his mother) to "Aguilar," coming from one of his grandmothers.
About his youth very little is known. In his discourse "Arte de la pintura" ("The art of painting") some references to various travels to Italy can be found and it is known that he stayed in Rome, probably to study painting. He returned to Spain shortly before 1610 with a reputation as both a painter and a poet. In the preface to the Novelas exemplares, Miguel de Cervantes says that Jáuregui painted his picture, and in the second part of Don Quixote, praises Jáuregui's translation of Tasso's Aminta, published at Rome in 1607. The picture by Jáuregui is lost; there is no evidence supporting any surviving painting being that of Jáuregui.
Jáuregui's Rimas (1618), a collection of graceful lyrics, where he integrated also some translations of Horace, Martial and Ausonius, is preceded by a controversial preface which attracted much attention on account of its outspoken declaration against the culteranismo of Luis de Góngora. Another Spanish poet, Francisco de Quevedo, mentioned Jáuregui in "La Perinola" with scorn.