The Greece runestones are about 30 runestones containing information related to voyages made by Norsemen to the Byzantine Empire. They were made during the Viking Age until about 1100 and were engraved in the Old Norse language with Scandinavian runes. All the stones have been found in modern-day Sweden, the majority in Uppland and Södermanland. Most were inscribed in memory of members of the Varangian Guard who never returned home, but a few inscriptions mention men who returned with wealth, and a boulder in Ed was engraved on the orders of a former officer of the Guard.

A runestone is typically a raised stone with a runic inscription, but the term can also be applied to inscriptions on boulders and on bedrock. The tradition of erecting runestones as a memorial to dead men began in the 4th century and lasted into the 12th century, but the majority of the extant runestones date from the late Viking Age. While most of these are located in Scandinavia, particularly Sweden, there are also scattered runestones in locations that were visited by Norsemen. Runestones were usually brightly coloured when erected, though this is no longer evident as the colour has worn off.