Year 108 (CVIII) was a leap year starting on Saturday of the Julian calendar. In Rome at the time, it was known as the Year of the Consulship of Trebonius and Bradua (or, less frequently, year 861 Ab urbe condita). The denomination 108 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

• Appius Annius Trebonius Gallus and Marcus Atilius Bradua become Roman Consuls.

• Tacitus writes Histories, which covers the period from AD 69 to AD 96.^[1]
• The Hypogeum of Yarhai, an underground tomb from the Syrian city of Palmyra dedicated to the family of Yarhai, is built.

• Hyacinth of Caesarea, Christian martyr