The coat of arms of Queensland is one of the formal symbols of the Australian state of Queensland and represents the King's constitutional authority throughout the state. It is the oldest of the state arms of Australia, having been granted in 1893 by Queen Victoria, through the simplest heraldic grants of only the shield of arms, motto, helmet, mantling and crest. In 1977, the red deer and the brolga were assigned as supporters by Queen Elizabeth II during her Silver Jubilee.

Australian heraldry is the style and tradition of using armorial achievements, sometimes known as coats of arms, and other heraldic bearings and insignia in Australia. It largely follows the Gallo-British tradition of heraldry also followed in England, Scotland, Ireland, Canada and New Zealand.