Domingo de Soto (1494 – November 15, 1560) was a Dominican priest and Scholastic theologian born in Segovia, Spain, and died in Salamanca at the age of 66. He is best known as one of the major figures of the philosophical movement known as the School of Salamanca, together with Francisco de Vitoria.
Trained in Alcala, Spain, and Paris, France, before being made professor of Philosophy at Alcala in 1520, he left academia to join the Dominicans and returned to take the chair of theology at Salamanca University in 1532. He is best known in economic theory and theological circles for his writings defending the price differential in usury as compatible with "just price" from the perspective of the Thomists.