St. Peter's Cathedral, or variations of the name, may refer to:
Australia
- St Peter's Cathedral, Adelaide, an Anglican cathedral in the South Australian capital of Adelaide
- St Peter's Cathedral, Armidale, an Anglican cathedral in New South Wales
Bangladesh
- St Peter's Cathedral, Barisal, a cathedral in Barisal, Bangladesh
Canada
- St. Peter's Cathedral Basilica, London, Ontario
- Cathedral of Saint Peter-in-Chains, Peterborough, Ontario
- St. Peter's Cathedral (Charlottetown), Prince Edward Island
Colombia
Republic of Congo
Croatia
- Đakovo Cathedral, Cathedral basilica of St. Peter in Đakovo
France
- St. Peter's Cathedral, Vannes, Brittany
Germany
- St. Peter's Cathedral (Osnabrück), Lower Saxony
- Bremen Cathedral, dedicated to St. Peter
- Cologne Cathedral, North Rhine-Westphalia, dedicated to St. Peter
- Regensburg Cathedral, Bavaria, dedicated to St. Peter
- Cathedral of St. Peter at Schleswig, Schleswig-Holstein
- Cathedral of Saint Peter, Trier, Rhineland-Palatinate
- Cathedral of St Peter, Worms, Rhineland-Palatinate
Honduras
Indonesia
Ireland
Italy
- Cathedral Basilica of St. Peter Apostle, Frascati
Morocco
- St. Peter's Cathedral, Rabat, a Roman Catholic cathedral located in downtown Rabat, Morocco, at place du Golan (Golan Square). It is built in Art Deco and is the seat of the Archdiocese of Rabat
New Zealand
- St. Peter's Cathedral, Hamilton, the Anglican cathedral in Hamilton, located in the Waikato Region of North Island, New Zealand. It is located on a small hill, known as Cathedral Hill (Pukerangiora in Maori), in the southern central part of the city off Victoria Street
Spain
- Cathedral of Jaca, dedicated to St. Peter
United Kingdom
- Exeter Cathedral, Exeter, England, formally known as "Cathedral Church of Saint Peter, Exeter"
- Bradford Cathedral, Bradford, England, formally known as "Cathedral Church of St Peter, Bradford"
- Cathedral Church of St Peter, St Paul and St Andrew, Peterborough, Peterborough, England, also known as Saint Peter's Cathedral
- Lancaster Cathedral, Lancaster, England, formally known as "Saint Peter's Cathedral, Lancaster"
- St Peter's Cathedral, Belfast, Northern Ireland
- York Minster, York, England, dedicated to St. Peter and formally known as "Cathedral and Metropolitical Church of Saint Peter in York"
United States (by state)
- Our Lady of Mt. Lebanon-St. Peter Cathedral (Los Angeles), California (Maronite Catholic)
- St. Peter Chaldean Catholic Cathedral (El Cajon, California), seat for the Eparchy of St. Peter the Apostle
- Cathedral of Saint Peter (Wilmington, Delaware), Roman Catholic Diocese of Wilmington
- Cathedral Church of St. Peter (St. Petersburg, Florida), Episcopal Diocese of Southwest Florida
- Cathedral Church of St Peter (Tallahassee, Florida), ACNA Gulf Atlantic Diocese
- St. Peter's Cathedral (Belleville, Illinois), Roman Catholic Diocese of Belleville
- Cathedral of Saint Peter (Rockford, Illinois), Roman Catholic Diocese of Rockford
- Cathedral of Saint Peter (Kansas City, Kansas), Roman Catholic Archdiocese of Kansas City
- St. Peter Cathedral (Marquette, Michigan), listed on the National Register of Historic Places (NRHP) in Marquette County
- Cathedral of St. Peter the Apostle (Jackson, Mississippi), the seat of the Bishop of the Roman Catholic Diocese of Jackson, Mississippi
- St. Peter's Cathedral (Helena, Montana), Episcopal Diocese of Montana
- Cathedral Basilica of Saint Peter in Chains (Cincinnati), Ohio, listed on the NRHP in Hamilton County
- St. Peter Cathedral (Erie, Pennsylvania)
- Cathedral Basilica of Saints Peter and Paul (Philadelphia), Pennsylvania, listed on the NRHP in Philadelphia County
- St. Peter's Cathedral (Scranton, Pennsylvania) (Roman Catholic), listed on the NRHP in Lackawanna County
Vatican City
- St. Peter's Basilica, a church often mistaken for a cathedral
- Old St. Peter's Basilica, the building that once stood on the spot where the Basilica of Saint Peter stands today in Rome