1708 (MDCCVIII) was a leap year starting on Sunday of the Gregorian calendar and a leap year starting on Thursday of the Julian calendar, the 1708th year of the Common Era (CE) and Anno Domini (AD) designations, the 708th year of the 2nd millennium, the 8th year of the 18th century, and the 9th year of the 1700s decade. As of the start of 1708, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.

• July 11 – War of the Spanish Succession: Allied forces commanded by John Churchill, 1st Duke of Marlborough defeated the French at the Battle of Oudenarde.
• August 18 – War of the Spanish Succession: The British capture Minorca, Spain.