The Cathedral Church of Saint Martin, Leicester, commonly known as Leicester Cathedral, is a Church of England cathedral in Leicester, England and the seat of the Bishop of Leicester. The church was elevated to a collegiate church in 1922 and made a cathedral in 1927 following the establishment of a new Diocese of Leicester in 1926.

Leicester is a city, unitary authority area, unparished area and the county town of Leicestershire in the East Midlands of England. It is the largest city in the East Midlands with a population of 373,399 in 2022. The greater Leicester urban area had a population of 559,017 in 2021, making it the 11th most populous in England, and the 13th most populous in the United Kingdom. A 2023 report ranked Leicester 16th out of the 50 largest UK cities on a range of economic measures, and the first of seven East Midlands cities.