Wormstone (also Warmstone) is a hamlet in the parish of Waddesdon, in Buckinghamshire, England. It is located just south-south east of the main village.
In the 13th and 14th centuries, the hamlet was one fifth of the fiefdom of Wallingford.
Coordinates: 51°50′28″N 0°54′47″W / 51.841°N 0.913°W