Cornsay is a hamlet and civil parish in County Durham, England. It is southeast of Consett and southwest of Durham. It consists of nineteen dwellings, including four farms & is the home of Greenacres Nudist club. All formerly belonged to Ushaw College for the training of Catholic priests, hence the organised nomenclature. East and West Farms are now in private hands as homes but the other two are still active, South Farm run by the Suddes family and North Farm by the Tweddle family.
On the village green is the enigmatic "draw well": on first look a bus shelter but, on closer inspection, a building with a 17th-century dedication. It was once the main source of water for the village, and later a site for the sale of paraffin once the village was larger. It was restored in 2007 by the removal of a breeze-block infill that had blocked the doorway and now has a new wrought-iron gate that allows inspection of the interior of the building.
See also Cornsay Colliery.