Coat of arms of Triballia

The coat of arms of Triballia is a historical coat of arms attributed to medieval Serbia by various armorials, and is today depicted in several Serbian municipality coat of arms in Šumadija. The motif is of a severed (erased) wild boar's head with an arrow pierced in its mouth or through its head.

Prior to the 19th century the depiction was used for Serbia in armorials but not by the Serbs themselves; it was in use by the Hungarian kings with pretensions over Serbia. In the Habsburg Monarchy, the Flag of Serbia (Latin: Vexillum Serviae) with this depiction was one of the flags given to an honorary flag-bearer during the coronation of the King of Hungary, since 1563. In the Chronicle of the Council of Constance of Ulrich Richental from 1415, during the reign of Serbian Despot Stefan Lazarević, the motif is used as the coat of arms for the Serbian Empire. Conrad Grünenberg used it for "Serbia" in 1483. It was used to depict historical Serbia in numerous armorials dating between the 15th and 18th centuries, alongside the white double-headed eagle and cross with four firesteels. It was not used in any of the Illyrian Armorials.

The coat of arms of Serbia (a cross with four firesteels) and "Trivalija" (a boar head pierced with an arrow, denoting Šumadija) were included in the coat of arms of the Governing Council of Revolutionary Serbia upon its establishment in 1805. The usage of the name Triballia with this depiction comes from the Stemmatografia (1701) of Ritter-Vitezović who claimed that "Hungarian kings used the old symbol of Triballians for the kingdoms of Serbia and Rascia, and the seat of the Triballians was in Serbia", and was popularized through the later edition of Stemmatografia of Hristofor Žefarović (1741). The Triballi were an ancient tribe whose name was used as an exonym for the Serbs by archaizing Byzantine authors in the Middle Ages. Jovan Vladimir (r. 1000-16) was called the ruler of "Triballians and Serbs".

It is today used in several of the municipalities and cities of Šumadija in central Serbia, based on the usage in the Serbian Revolution (1804–17).