Demetrius III

Demetrius III may refer to:


 * Demetrius III of Abkhazia, King of Abkhazia
 * Demetrius III Aniketos, Indo-Greek king
 * Demetrius III Eucaerus (died 88 BC), Seleucid king
 * Demetrius III of Georgia (c. 1413–1453), King of Georgia