Thorney Abbey, now the Church of St Mary and St Botolph, was a medieval English Benedictine monastery at Thorney, Cambridgeshire in The Fens of Cambridgeshire, United Kingdom The earliest documentary sources refer to a mid-7th century hermitage destroyed by a Viking incursion in the late 9th century.

The focus of the settlement shifted away from the fen edge in the late 12th or early 13th century, the earlier site becoming a rubbish dump, perhaps because of encroaching water.

More substantial buildings were erected in the 16th century and these are thought to have been part of an expanding abbey complex, perhaps for use as guesthouses, stables, or workshops.

[2] As a large abbey of Anglo-Saxon England a number of saints have been buried and venerated in Thorney, including: Excavation was undertaken in 2002 prior to redevelopment, by University of Leicester Archaeological Services.

As well as pottery, animal bone and roofing material, a large deposit of 13th and 14th century painted glass was found in and around the buildings.