San Marzano may refer to:

• San Marzano tomato, Italian variety of tomatoes
• San Marzano di San Giuseppe, Italian municipality of the Province of Taranto, Apulia
• San Marzano Oliveto, Italian municipality of the Province of Asti, Piedmont
• San Marzano sul Sarno, Italian municipality of the Province of Salerno, Campania

• Tyrrhenian Sea
• Tyrrhenian sea
• Tyrrhenoi
• Tyrrhenus
• TYR Sport, Inc.
• Tyr (swimwear)
• Tyrtaeus
• Tyrus
• Tyrus Raymond Cobb
• Tyrus Wong
• TYS
• Tysabri
• Tyseley
• Tyseley Car Company
• Tyseley Locomotive Works
• Tysfjord
• Tyskie
• Tyskie beer
• Tyskie Gronie
• Tyskie Ksiazece
• Tysnes
• Tysnes, Norway
• Tyson
• Tyson Beckford
• Tyson Chandler