Perkin Warbeck (c. 1474 – 23 November 1499) was a false pretender to the English throne. Warbeck claimed to be Richard of Shrewsbury, Duke of York, who was the second son of Edward IV and one of the so-called "Princes in the Tower". Richard, were he alive, would have been the rightful claimant to the throne, assuming that his elder brother Edward V was dead, and that he was legitimate – a contentious point.

Due to the uncertainty as to whether Richard had died (either of some natural cause or from having been murdered in the Tower of London) or whether he had somehow survived, Warbeck's claim gained some support. Followers may have truly believed Warbeck was Richard, or may have supported him simply because of their desire to overthrow the reigning king, Henry VII, and reclaim the throne. Given the lack of knowledge regarding Richard's fate, and having received support outside England, Warbeck emerged as a significant threat to the newly established Tudor dynasty; Henry declared Warbeck an impostor.

Warbeck made several landings in England backed by small armies but met strong resistance from the King's men and surrendered in Hampshire in 1497. After his capture, he retracted his claim, writing a confession in which he said he was a Fleming born in Tournai around 1474. He was executed on 23 November 1499. Dealing with Warbeck cost Henry VII over £13,000 (equivalent to £10,454,000 in 2020), putting a strain on Henry's weak state finances.