William of Nassington

William of Nassyngton (died 1354) was an English clerical administrator and translator from Nassington in Northamptonshire.

He is the author of the Middle English poem Speculum Vitae (The Mirror of Life), written in the middle to late 14th century. This consists of a commentary on the Lord's Prayer.

The poem derives from a prose French work, Somme le roi, dated 1279.