Juan de Lienas (fl. 1617 - 1654), a Spaniard who most likely moved to Mexico sometime prior to 1620, Juan de Lienas worked primarily at two convents near Mexico City where his music was found.

Juan de Lienas (fl. 1617-1654) was a composer active in Latin America during the early to mid-17th century. He also served as a chapel master and conductor in the Catholic Church. Much of his life is still a mystery, but what is known comes from accounts in the only two manuscripts that include his compositions: El Codice del Convento del Carmen and the Newberry Choirbooks. Some of these comments are unflattering to the composer, insulting his appearance and personality. He is identified as a cacique (a native of noble birth), an Indian, and a married man, all of which may have kept him from higher standing within the church. One scholar indicates that he may have been born in Spain. Most scholars place him in Mexico in the employ of the convent connected to the cathedral of Mexico City, but one asserts that he also worked in Havana. His music is indicative of the early Renaissance, following the Polyphonic styles of composers such as Francisco Guerrero and Cristóbal de Morales. He is often associated with Juan Hernandez, Fernando Franco, and Francisco López. The latter two also had compositions in the Carmen Codex. His known compositions include: two masses (one of which is a Requiem), eleven motets, three magnificats, and two sets of lamentations. The two manuscripts which include his music may have at one point been connected. Both include his Salve Regina for 4 voices, Lamentation for 4 voices, and Magnificat for 5 voices. His compositions were first brought to the states by means of the Newbery Choirbooks, which are still performed today.