Norwich Cathedral, formally the Cathedral Church of the Holy and Undivided Trinity, is a Church of England cathedral in the city of Norwich, Norfolk, England. The cathedral is the seat of the bishop of Norwich and the mother church of the diocese of Norwich. It is administered by its dean and chapter, and there are daily Church of England services. It is a Grade I listed building.

Norwich is a cathedral city and district of the county of Norfolk, England of which it is the county town. Norwich is by the River Wensum, about 100 mi (160 km) north-east of London, 40 mi (64 km) north of Ipswich and 65 mi (105 km) east of Peterborough. As the seat of the See of Norwich, with one of the country's largest medieval cathedrals, it is the largest settlement and has the largest urban area in East Anglia. The population of the Norwich City Council local authority area was estimated to be 144,000 in 2021, which was an increase from 143,135 in 2019. The wider built-up area had a population of 213,166 in 2019.