The Atlantic Star is a Second World War medal was issued between 03 September 1939 and 08 May 1945 (Europe) or 02 September 1945 (Pacific).

The Atlantic Star was awarded for six months of service afloat or two months for air-crew service and was not awarded unless the recipient was qualified for the 1939-1945 Star by six months of operational service afloat or by two months of airborne service. Therefore, the total requirement was twelve months of service afloat or four months of airborne service.

The six–pointed star is yellow copper zinc alloy. The obverse has a central design of the Royal and Imperial cypher, surmounted by a crown. The cypher is surrounded by a circlet containing the words ‘The Atlantic Star’.

Stars issued to Australian personnel have recipient names engraved on the plain reverse.

The shaded and watered ribbon consists of three equal stripes; blue, white, and sea-green, to represent the Atlantic Ocean.