Tsushima may refer to:

A place in Japan:

• Tsushima, Aichi, a city in Aichi Prefecture
• Tsushima, Ehime, a town dissolved in August 2005, formerly located in Ehime Prefecture
• Tsushima, Nagasaki, a city in Nagasaki Prefecture
• Tsushima Basin, also known as Ulleung Basin, located at the juncture of the Sea of Japan and the Korea Strait
• Tsushima Island, part of Nagasaki Prefecture
• Tsushima Province, a historical province, contiguous with modern Tsushina Subprefecture
• Tsushima Subprefecture, an administrative subdivision of Nagasaki prefecture
• Tsushima Strait, the eastern channel of the Korea Strait

A Japanese surname:

• Tsushima Yuko (born 1947), pen name of "Tsushima Satoko", a Japanese fiction writer, essayist and critic
• Tsushima Yuji, a writer

Tsushima may also refer to:

• Tsushima Maru, a civilian ship sunk by American naval forces during World War II
• Battle of Tsushima (1905), also known as the "Sea of Japan Naval Battle", the last sea battle of the Russo-Japanese War
• Kuroshio Current, also known as the "Tsushima Current", an ocean current found in the western Pacific Ocean

Japanese surnames

Tsushima | 쓰시마 | Tsushima