St. Martin's Cathedral may refer to
- St Martin's Cathedral, Bratislava, Slovakia
- St Martin's Cathedral (Spišská Kapitula), Slovakia
- Lucca Cathedral in Lucca, La cattedrale di San Martino
- Mainz Cathedral in Mainz
- St. Martin's Cathedral, Utrecht
- St Martin's Cathedral, Ypres, technically no longer a cathedral
- St. Martin's Cathedral (Gander), Newfoundland