Allerton Castle is a Grade I listed nineteenth century Gothic house in North Yorkshire, England. It was rebuilt from 1848-1853 and has 7 principal reception rooms, 45 principal bedrooms, 18 bathrooms, and a chapel. The great hall is 80 feet (24 m) high. It now stands in 6 acres (24,000 m²) grounds, and has a 40,000 square foot (3,700 m²) ground area.

An earlier version of the house was once used by HRH Prince Frederick, Duke of York (brother of King George IV).

Allerton Castle was originally called Stourton House, and was bought in 1983 by Dr Gerald Rolph from the Hon Edward Stourton, whose family owned the house 1805-1983 (the Lords Mowbray). The contents were sold in 1965.

It is run by the Gerald Arthur Rolph Foundation for Historic Preservation and Education and rooms are available to hire for corporate events and weddings.

One third of the house was burnt in a major fire in January 2005.