Lancaster Cathedral, also known as The Cathedral Church of St Peter and Saint Peter's Cathedral, is a Roman Catholic cathedral in Lancaster, Lancashire, England. It was a Roman Catholic parish church until 1924, when it was elevated to the status of a cathedral. It started as a mission church in 1798, and the present church was built on a different site in 1857–59. It was designed by E. G. Paley in the Gothic Revival style and is a grade II* listed building. In 1901 a baptistry was added by Austin and Paley, and the east end was reordered in 1995 by Francis Roberts. The cathedral is in active use, arranging services, concerts and other events, and is open to visitors.

Lancaster is a city in Lancashire, England and the main cultural hub, economic and commercial centre of City of Lancaster district. The city is on the River Lune directly inland from Morecambe Bay. Lancaster is the county town although Lancashire County Council has been based at County Hall in Preston since its formation in 1889.