The coat of arms of Adelaide was granted by the Heralds' College on 20 April 1929.

Blazon

Shield

The arms consist of a blue shield with a gold cross, which is surmounted by a red cross.

Crest

Above the shield is a golden mural crown, which is a common element in the arms of municipalities. Above the mural crown is the crest of the Corporation. It is a right arm holding a miner’s pick, representing another of the industries of the early years which contributed so much to the wealth of South Australia and Adelaide. The arm is resting on a wreath of the colours of the city, namely blue and gold.

Supporters

On the right side of the shield there is a red kangaroo, and on the left side a lion, which guard and uphold the shield. The lion represents the English colonists of South Australia and the kangaroo represents the country they helped to build. The lion simultaneously represents Aion, the god of time, and the lion of dominion. The red kangaroo represents the Kaurna people's totem, the red kangaroo dreaming.

Base

The base of the shield stands on a grassy green field of rising ground.

Motto

A scroll below the arms has a Latin motto Ut Prosint Omnibus Conjuncti which translates as "united for the common good".