Abingdon Abbey was a Benedictine monastery in Abingdon-on-Thames in the modern county of Oxfordshire in the United Kingdom. Situated near to the River Thames, it was founded in c.675 AD and was dedicated to Mary, mother of Jesus. It was disestablished in 1538 during the dissolution of the monasteries. A few physical remnants of the Abbey buildings survive within Abingdon-on-Thames.

Abingdon-on-Thames, commonly known as Abingdon, is a historic market town and civil parish on the River Thames in the Vale of the White Horse district of Oxfordshire, England. The historic county town of Berkshire, the area was occupied from the early to middle Iron Age and the remains of a late Iron Age and Roman defensive enclosure lies below the town centre. Abingdon Abbey was founded around 676, giving its name to the emerging town. In the 13th and 14th centuries, Abingdon was an agricultural centre with an extensive trade in wool, alongside weaving and the manufacture of clothing. Charters for the holding of markets and fairs were granted by various monarchs, from Edward I to George II.