Southern Cross is the English name of Crux, a constellation visible in the Southern Hemisphere.

The term Southern Cross can also refer to:

• the blue saltire as used in various flags of the Confederate States of America in the American Civil War
• the Eureka Flag in Australia
• the town of Southern Cross, Western Australia
• the Southern Cross Cable, a submarine communications cable connecting New Zealand, Australia, Fiji, Hawaii, Oregon and California
• the aircraft flown by pioneer aviator Sir Charles Kingsford Smith across the Pacific

Several organisations and companies are named Southern Cross, including:

• Southern Cross University [1] in New South Wales, Australia
• Southern Cross Astronomical Society [2] in Florida
• Southern Cross Bioethics Institute [3] in South Australia
• Southern Cross Healthcare [4] in New Zealand
• Southern Cross Broadcasting [5] in Australia

In Fiction:

• The Army of the Southern Cross: A political-military organisation in the Robotech Universe. Originally the anime Super Dimension Cavalry Southern Cross.