St. Peter's Square is a plaza located in front of St. Peter's Basilica in the Vatican City.
St. Peter's Square may also refer to:
- St Peter's Square, London
- St Peter's Square, Manchester, England
- St Peter's Square tram stop in Manchester
- One St Peter's Square, a high-rise office building in Manchester
- Two St Peter's Square, a high-rise office building in Manchester
- 3 St Peter's Square, a high-rise hotel and aparthotel in Manchester
- St. Peter's Square (Fort Wayne, Indiana)