1715 (MDCCXV) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Saturday of the Julian calendar, the 1715th year of the Common Era (CE) and Anno Domini (AD) designations, the 715th year of the 2nd millennium, the 15th year of the 18th century, and the 6th year of the 1710s decade. As of the start of 1715, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.

For dates within Great Britain and the British Empire, as well as in the Russian Empire, the "old style" Julian calendar was used in 1715, and can be converted to the "new style" Gregorian calendar (adopted in the British Empire in 1752 and in Russia in 1923) by adding 11 days.