Thornton Watlass Hall is a large Grade I listed Georgian country house in Thornton Watlass, North Yorkshire, England, some 3 miles (5 km) north of Masham.
It is constructed of stone with an 18th-century gabled two-storey main block and 16th century wings at each end.
By the mid-1700s the house and estate had descended in the Dodsworth family to Henrietta, daughter of John Dodsworth and sister and heiress of Frederick Dodsworth, who married John Silvester Smith of Newland Park, Drax.
Sir David John Smith-Dodsworth, the 9th Baronet, now occupies the house.
The Hall has been featured over the years on several television dramas, including All Creatures Great and Small (BBC), Wuthering Heights (ITV) and Heartbeat (ITV) where it has featured as Ashfordly Hall and Websters Hotel for the past nine years.