Saturn may refer to:

• Saturn (planet) – the sixth planet from the Sun
• Saturn automobile – a brand of automobile
• Saturn (Roman god) – in Roman mythology, the first of the Titans
• Saturn, a German electronics store
• Saturn rocket – a family of rockets, the most famous of which is the Saturn V
• Saturn (detachment) - the Russian Ministry of Justice special forces unit
• Saturn (CPU) – the CPU in certain Hewlett-Packard programmable calculators,
• "Saturn, the Bringer of Old Age" – a movement in Gustav Holst's The Planets suite
• Sega Saturn – a video game console

In fiction

• Saturn Girl – a comic book superhero
• Saturn Queen – a comic book supervillain
• Sailor Saturn – a Sailor Moon character