Haughton Castle is a privately owned country mansion and Grade I listed building, situated to the north of the village of Humshaugh on the west bank of the North Tyne.^[1][2] It is around 5+1⁄2 miles (8.9 km) north of the market town of Hexham, Northumberland.

It was built originally in the 13th century as a tower house and enlarged and fortified in the 14th century.^[3] At this time the castle was owned by Gerald Widdrington and, although the Widdringtons still owned it in the early 14th century, the Swinburns were living there.^[4]

By the 16th century, the castle fell into ruin and disrepair, and it was attacked by Border reivers.^[4] A survey of 1541 reported the roof and floors to be "decayed and gone".^[5]

The property was acquired by the Smith family in about 1640,^[3] but in 1715 a further survey stated the building to be ruinous.^[6]

Significant alterations were carried out for the Smiths between 1816 and 1845, latterly by architect John Dobson to convert the ruin into a substantial mansion.^[5] The Crawshaw family came into possession in 1862,^[4] and a west wing was added for them by Anthony Salvin in 1876.^[5] In the late 19th century it was acquired by the Cruddas family.^[7]

Part of the castle served as a hospital during the Second World War.^[8] It is currently owned by the Braithwaite family.^[9]

Some commentators suggest it is the location for the traditional song "Waters of Tyne".^[10]