St Mary's Abbey, Melrose is a partly ruined monastery of the Cistercian order in Melrose, Roxburghshire, in the Scottish Borders. It was founded in 1136 by Cistercian monks at the request of King David I of Scotland and was the chief house of that order in the country until the Reformation. It was headed by the abbot or commendator of Melrose. Today the abbey is maintained by Historic Environment Scotland as a scheduled monument.