St John the Baptist's Church, Chester

St John the Baptist's Church is a former cathedral in Chester, Cheshire, England during the Early Middle Ages. The church, which was first founded in the late 7th Century by the Anglo-Saxons, is outside the Chester city walls on a cliff above the north bank of the River Dee. It is now considered to be the best example of 11th–12th century church architecture in Cheshire, and was once the seat of the Bishop of Lichfield from 1075 to 1095.

The church remained Chester's cathedral until 1082 when the see was transferred to Coventry. With the English Reformation in the 16th century, a separate Diocese of Chester was created in 1541; the former Chester Abbey became Chester Cathedral and St John the Baptist lost its ecclesiastic importance. The east wing was partially demolished and its status was reduced to a parish church. Although repairs were carried out during the reign of Elizabeth I, the church was garrisoned in the English Civil War by the Roundheads during the siege of Chester in 1645. In the middle to late 19th century, restorations created the present-day church within remains of the larger medieval building. The site is designated Grade I listed building and is recorded in the National Heritage List for England.

St John the Baptist remains an active Church of England parish church in the diocese of Chester, the archdeaconry of Chester and the deanery of Chester. Historian Alec Clifton-Taylor includes it in his list of 'best' English parish churches.