Juan de(l) Junco (1503 in Ribadesella, Asturias, Castile – ? in Santo Domingo) was a Spanish conquistador who participated in the Spanish conquest of the Muisca people. Del Junco started his career as a conquistador in the 1526 expedition led by Sebastian Cabot exploring the Río de la Plata in present-day Argentina. In 1535, he arrived in Santa Marta on the Colombian Caribbean coast from where the expedition in search of El Dorado set off in April 1536.