Blagdon Hall (grid reference ) is a privately owned English country house near Cramlington in Northumberland. It is a Grade I listed building. The house and estate have been in the ownership of the White Ridley family since 1698. The present Viscount Ridley is the science writer and hereditary peer Matt Ridley.
The hall was built in two phases between about 1720 and 1752 by Matthew White and his son Sir Matthew White, 1st Baronet, whose sister Elizabeth married Matthew Ridley (1719–1778), four times Mayor of Newcastle upon Tyne. It was substantially enlarged in the nineteenth century to designs by architects John Dobson and Ignatius Bonomi. Some of these additions were removed following a fire in 1944.
The stable block designed by James Wyatt in Palladian style in 1791 is Grade II* listed and a 19th-century folly in the grounds is Grade II listed. The gardens also contain the only surviving bronze of John Graham Lough's gigantic statue of Milo of Croton.
On the estate is Shotton Surface Mine, a large open cast coal mine and Northumberlandia (the "Lady of the North"), a huge land sculpture in the shape of a reclining female figure made from mining waste. The Royal Agricultural Society of England awarded the Bledisloe Gold Medal in 2015 to Ridley as they wanted to highlight the extensive environmental improvement work that has been undertaken across the land.
- Historic England. "Blagdon Hall (1042662)". National Heritage List for England. Retrieved 26 November 2013.
- "Blagdon Hall, Stannington". British listed buildings. Retrieved 7 August 2015.
- "Northumberland's Blagdon Estate landowner wins prestigious national award". Chronicle Live. Retrieved 6 March 2019.