Æthelred, archbishop of Canterbury

Year 888 (DCCCLXXXVIII) was a leap year starting on Monday of the Julian calendar.

Æthelred was an Anglo-Saxon Archbishop of Canterbury in medieval England. Although one source states that he was Bishop of Wiltshire prior to his elevation to Canterbury, this has been shown to be false. Much of Æthelred's time in office was spent dealing with the dislocations caused by the invasion of England by Vikings. There were also conflicts with King Alfred the Great over ecclesiastical matters as well as the desire of the papacy to reform the English clergy.

The Diocese of Canterbury is a Church of England diocese covering eastern Kent which was founded by St Augustine of Canterbury in 597. The diocese is centred on Canterbury Cathedral and is the oldest see of the Church of England.