Walter Tyler, commonly known as Wat Tyler (died June 15, 1381) was the leader of the English Peasants' Revolt of 1381.

His birthdate is not known, and little is known about his life. As his name suggests Tyler was a tyler. Historians believe he was probably born in Kent or Essex and may well have served as a soldier in the wars against France.

After taking control of Canterbury, Wat led his peasant army to Blackheath outside London and then went on to invade the city. The invasion of the city resulted in the murder of the Archbishop of Canterbury. King Richard II met the rebel army at Mile End, and promised to address the peasants' grievances, which included the imposition of unpopular taxes.

The rebels initially forced the government into making concessions, but in the midst of renewed negotiations on June 15, Tyler was killed as a result of a fight with William Walworth , the Mayor of London; the circumstances of this are uncertain. The rebellion ended shortly after his death.