Zet or ZET may refer to:

• Zagrebački električni tramvaj, Zagreb Electric Tram, public transport operator in Zagreb, Croatia
• Zet, a clone x86 processor
• Radio ZET, Polish radio station
• Association of the Polish Youth "Zet", pre-1914 Polish organisation
• Zet, the creator of Norwegian music project Ram-Zet
• NK ZET, Croatian football club
• Operation Zet, Russian support for China as part of the Sino-Soviet Non-Aggression Pact
• Djet, Egyptian pharaoh

• Federico Púa
• Federico Quarenghi
• Federico Ramirez
• Federico Ramírez
• Federico Rauch
• Federico Rengifo
• Federico Rengifo Vélez
• Federico Renjifo Veléz
• Federico Renjifo Vélez
• Federico Ricca
• Federico Ricci (footballer)
• Federico Ricci (soccer)
• Federico Richard Adelbart Johow
• Federico Richter Fernandez-Prada
• Federico Rocchetti
• Federico Rodriguez
• Federico Rodríguez
• Federico Rossano
• Federico Sanseverino
• Federico Santiago Garcia Di Bernardo
• Federico Sardella
• Federico Scappi
• Federico Schianchi
• Federico Scoppa
• Federico Serraiocco