The Diocese of Hereford is a Church of England diocese based in Hereford, covering Herefordshire, southern Shropshire and a few parishes within Worcestershire in England, and a few parishes within Powys and Monmouthshire in Wales.

The diocese is one of the oldest in England (created in 676 and based on the minor sub-kingdom of the Magonsæte) and is part of the Province of Canterbury.

[2] The provincial episcopal visitor (for parishes in this diocese – among twelve others in the western part of the Province of Canterbury – who reject the ministry of priests who are women, since 1994) is the Bishop suffragan of Ebbsfleet, who is licensed as an honorary assistant bishop of the diocese in order to facilitate his work there.

As reported in the Church of England's Statistics for Mission 2018, published in October 2019, the diocese had a population of 331,000, fewer than any other except Sodor and Man.

[5] The following deanery mergers have taken place: *including Cathedral Last updated 25 November 2020.