Thornton Watlass is a small village and civil parish in North Yorkshire, England. It is located north of Masham and south of Bedale on the eastern slopes of the Ure Valley at the entrance to Wensleydale and the Yorkshire Dales National Park. It is north of Ripon, from the A1(M) motorway, from the main railway line at Northallerton and from Teesside Airport. Its population was 180 in 2000, 190 in 2005, 224 in 2011 and 240 in 2016.
Saxon remains of two cross-heads are evidence that people lived in the area before the Norman Conquest in 1066. They are on display in Thornton Watlass Church.
The Domesday Book of 1086 mentions the separate villages of Thornton and Watlass. Before the Norman conquest the Saxon owners of these villages were Ulward and Stan; however Thornton is shown in the Domesday Book as being owned by Ribald, brother of Alan Earl of Richmond. Thornton Watlass Hall and estate have been owned by the Dodsworth family since 1415.
The Anglican Church of St Mary the Virgin stands a little way outside the village to the southwest. It was rebuilt, with the exception of the tower, in 1868 in the Perpendicular style. The tower contains some living accommodation (including a toilet) and was probably used as a place of safety in times of strife.
The village school was built in 1872. with a population of 222 at the 2011 Census. Until 2023, Thornton Watlass was part of the Richmond (Yorks) parliamentary constituency. It was removed and added to the expanded Thirsk and Malton Constituency, in part due to areas from that constituency being created into a new seat of Wetherby and Easingwold.
From 1974 to 2023 it was part of the Hambleton District, it is now administered by the unitary North Yorkshire Council.
The Church of England primary school is federated with Snape Community School and had 41 children on the roll in 2007 aged between 4 and 11 years, taught in two mixed-age classes. By 2016 pupil numbers had dropped to 25.
There is also provision for under-5s in the village hall.
The village public house, restaurant and hotel, The Buck Inn overlooks the village green. Specialities include locally brewed real ale, Sunday lunchtime jazz and a large room for conferences and functions.
Just to the north of the village Thornton Watlass Hall is a private home but also provides hotel accommodation.