Willersley Castle is a late 18th-century country mansion above the River Derwent at Cromford, Derbyshire, outside Peak District National Park.

[2][3] Standing in 60 acres (240,000 m2) of grounds, the Classical-style castellated house is three storeys with a seven-bay frontage, the central bay flanked by full-height round towers.

[4] Originally named "Willersley Hall",[5] it was built on the slopes of Wild Cat Tor, 400 feet (120 m) above sea level, for the occupation of the industrialist Sir Richard Arkwright by the architect William Thomas.

During the early 1800s, visitors to the nearby Matlock Bath spa, were invited to visit the castle property and tour the gardens and pleasure grounds.

In 2020, the hotel had "some 30,000sq ft of living space over three floors, ... further accommodation in the mews house and gatehouse, grass tennis courts, a swimming pool and gym area" according to Country Life (magazine) in 2020.

Although some design elements have been partially lost, the grounds of Willersley Castle, in the picturesque style, are of international importance and exceptional significance, which is reflected in their inclusion as one of the key features in the Derwent Valley Mills World Heritage Site, as well as on the National Heritage List for England’s Register of Parks and Gardens of Special Historic Interest at Grade II.The hotel was temporarily closed during the COVID-19 pandemic lockdown in 2020.