Southwell Minster, formally the Cathedral and Parish Church of the Blessed Virgin Mary, is a Church of England cathedral in Southwell, England. The cathedral is the seat of the bishop of Southwell and Nottingham and the mother church of the diocese of Southwell and Nottingham; it is governed by a dean and chapter. It is a grade I listed building.

Southwell is a minster and market town, and a civil parish, in the district of Newark and Sherwood in Nottinghamshire, England. It is home to the grade-I listed Southwell Minster, the cathedral of the Anglican Diocese of Southwell and Nottingham. The population of the town was recorded at 7,491 in the 2021 census.