Oriel College (/ˈɔːriəl/) is a constituent college of the University of Oxford in Oxford, England. Located in Oriel Square, the college has the distinction of being the oldest royal foundation in Oxford (a title formerly claimed by University College, whose claim of being founded by King Alfred is no longer promoted). In recognition of this royal connection, the college has also been historically known as King's College and King's Hall. The reigning monarch of the United Kingdom (since 2022, Charles III) is the official visitor of the college.
The original medieval foundation established in 1324 by Adam de Brome, under the patronage of King Edward II of England, was the House of the Blessed Mary at Oxford, and the college received a royal charter in 1326. In 1329, an additional royal grant of a manor house, La Oriole, eventually gave rise to its common name. The first design allowed for a provost and ten fellows, called "scholars", and the college remained a small body of graduate fellows until the 16th century, when it started to admit undergraduates. During the English Civil War, Oriel played host to high-ranking members of the king's Oxford Parliament.