Back Vlag van die Kerseiland Afrikaans علم جزيرة كريسماس Arabic علم جزيرة الكريسماس ARZ Сцяг Вострава Каляд Byelorussian Национално знаме на Рождество (остров, Австралия) Bulgarian ক্রিসমাস দ্বীপমালার ফিরালহান BPY Zastava Božićnog ostrva BS Bandera de l'Illa Christmas Catalan Vlajka Vánočního ostrova Czech Flagge der Weihnachtsinsel German
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| Use | Civil and state flag    |
|---|---|
| Proportion | 1:2 |
| Adopted | 14 April 1986 (unofficially) |
| Design | Blue and green diagonal bicolour charged with a southern cross of four seven-pointed white stars and one smaller five-pointed white star on the blue half, a golden bosun bird in gold on the green half, and a gold circle in the centre containing the shape of the island in green |
| Designed by | Tony Couch |
The flag of Christmas Island was unofficially adopted in 1986 after being chosen the winner in a competition for a flag for the territory. It was designed by Tony Couch of Sydney, Australia.