St. Mungo's may refer to:
- St Mungo's Cathedral, Glasgow Glasgow Cathedral and The High Kirk of Glasgow
- St Mungo's Hospital for Magical Maladies and Injuries from the Harry Potter books
- St Mungo's Parish Church, Stirling, Scotland
- St Mungo's (charity), London's largest homelessness charity
See also
- Little St Mungo's Chapel, Glasgow (also known as St Mungo's Beyond the Walls, St Mungo's in the Fields, and St Mungo's Without the Walls)