The Plain is an important junction, now a roundabout constructed in 1950, just east of Magdalen Bridge in Oxford, England. To the east and southeast are St Clement's, Cowley Road and Iffley Road which leads to the Liddell Buildings of Christ Church on the other side of the Christ Church Meadow. Magdalen College School is to the south. Cowley Place, also to the south, leads to St Hilda's College, the most easterly college of the University of Oxford.
The Plain received its name after the parish church of St Clement's which stood here until 1829. The roundabout is the site of the former churchyard.