Soyuz 5 (, Union 5) was a Soyuz mission using the Soyuz 7K-OK spacecraft launched by the Soviet Union on 15 January 1969, which docked with Soyuz 4 in orbit. It was the first-ever docking of two manned spacecraft of any nation, and the first-ever transfer of crew from one space vehicle to another of any nation, the only time a transfer was accomplished with a space walk – two months before the US Apollo 9 mission performed the first ever internal crew transfer.

Soyuz-5 may refer to:

• Soyuz 5, a 1969 Soyuz spacecraft mission that performed the first ever space docking with Soyuz 4.
• Soyuz TMA-1, the mission identified by NASA as ISS Soyuz 5.
• Soyuz-5 (rocket), a Russian carrier rocket.

Sojuz 5 è la denominazione di una missione della navicella spaziale Sojuz sovietica. Si trattò del quarto volo equipaggiato di questa capsula nonché del tredicesimo volo nell'ambito del programma Sojuz sovietico.