Hugo of Oignies, C.R.S.A., (French: Hugo d'Oignies, before 1187 in Walcourt – c. 1240 in Oignies) was a lay brother of Oignies Priory. He was a metalworker and painter and is the last of the great jewelers of Mosan art. He is a representative of the school of the Entre-Sambre-et-Meuse and was considered the greatest artist of the Meuse Valley of his time.
In 1187 Hugo helped to found what became the Priory of St. Nicholas, along with his three brothers, all of whom were priests, when they moved from their native city in the County of Namur to live a monastic style of life by a small country chapel dedicated to St. Nicholas of Myra near Oignies in the Prince-Bishopric of Liège. Little is known of Hugo himself before 1228, when his works at the priory were first noted. Without doubt, he trained as a goldsmith. Hugo was literate, a master scribe, and a miniaturist. He signed many of his works. In circa 1230, Hugo produced a manuscript and silver book covers for the monastery. The book cover contains depictions of Hugo and St. Nicolas, the monastery's patron saint.
During a visit to the priory in 1228 or 1229 to consecrate an altar, Jacques de Vitry, C.R.S.A., Bishop of Saint-Jean d'Acre and later cardinal, became a patron of his work. Around that time, Hugo created what are considered among his masterpieces, an Evangeliary and a reliquary. He crafted a series of pieces in silver: reliquaries, monstrances, and other objects of worship, of which three signed pieces still exist.