Widdrington Castle is a Scheduled Ancient Monument and the site of a former medieval tower house and castle at Widdrington, Northumberland, England of which only earthworks now remain.

Engravings show a substantial tower with bartizans (projecting turrets) at the corners, similar to the surviving structure at nearby Belsay Castle.

[3] Anne of Denmark and her children stayed in the castle on their way to London on 7 June 1603.

[4] William Widdrington married the heiress of Blankney Hall, Lincolnshire in 1643 and the castle ceased to be the main family residence.

The estates of a later William Widdrington were sequestrated, and sold by the Crown, as a result of his attainder for treason for his part in the Jacobite rising of 1715.