Sado

Sado can refer to:

Sado, a city (佐渡市 Sado-shi) and an island (佐渡島 Sadogashima) of Niigata Prefecture, Japan
Sado province (佐渡国 Sado no kuni), a former province of Japan located on the island
Japanese tea ceremony (茶道 Sadō)
Sado River, a major river in Portugal
Prince Sado, a Joseon Korean prince (사도)
'Sado (佐渡 Sado), a short story by Osamu Dazai