Allmersbach's coat of arms displays a crossbow, in red and with its trigger guard facing right, upon a field of silver. The crossbow is a motif that has been associated with Allmersbach since 1686, though it is not known why, and the tincture is taken from the arms of the , which had property in the town. The coat of arms was approved for official use and a corresponding municipal flag issued by the Federal Ministry of the Interior on 16 September 1965.
