The Kingdom of Western Georgia was a late medieval de facto independent fragmented part of the Kingdom of Georgia that emerged during the Mongol invasions of the realm, led by King David VI Narin in 1259 and later followed by his successors. During this period, the Kingdom of Georgia (1256-1329) was reduced to the eastern part of the country and placed under Mongol control. Over the decades, the monarchy would fall into chaos and transform into a federation of autonomous principalities unruly of the central or regional royal power and authority.

David VI Narin (1225–1293), from the Bagrationi dynasty, was joint king of king (mepe) of Georgia with his cousin David VII from to 1246 to 1256. He made secession in 1259, and from 1259 to 1293, ruled a Kingdom of Western Georgia under the name David I, while his cousin David VII continued to rule in a reduced Kingdom of Georgia (1256–1329) in eastern Georgia, under Mongol control.