Nether Winchendon (also known as Lower Winchendon) is a village in Buckinghamshire, England. It is located near the border with Oxfordshire, about five miles west of Aylesbury, three miles south of Waddesdon.

The village name 'Winchendon' is Anglo Saxon in origin, and means 'hill at a bend'. The Winchendon villages were recorded in the Domesday Book of 1086 as Wincandone.

There is a grand manor in Nether Winchendon, called Nether Winchendon House. A former priory under Nutley Abbey in Long Crendon, it was purchased and largely remodelled by the Duke of Bedford in the Sixteenth century. It is now open to the public and is noted for its magnificent interior.