Domenico Valmagini (1677–1730) was an Italian architect and engineer, active in a Baroque style in the Duchy of Parma and in Lombardy. After the death of Giovanni Battista Barattieri, Domenico was appointed the main court architect for Ranuccio II. In 1695, he was replaced by the brothers Galli Bibiena at the behest of the new Duke Francesco Farnese.