Twelveheads (Cornish: Dewdhek Stamp) is a hamlet east of St Day in west Cornwall, England, United Kingdom.

Sets of stamps (machines used for crushing ore) were once used on the dressing floors in the village.

The former village pub and post office are both now private housing.

There is also the 'Twelveheads Gate' into the Poldice Valley - the path of the mineral tramway, popular with cyclists, horseriders and walkers.

About 500 yards to the south-east, down the Carnon Valley, is the portal of the Great County Adit that once drained all the mines in the locality.