1711 (MDCCXI) was a common year starting on Thursday of the Gregorian calendar and a common year starting on Monday of the Julian calendar, the 1711th year of the Common Era (CE) and Anno Domini (AD) designations, the 711th year of the 2nd millennium, the 11th year of the 18th century, and the 2nd year of the 1710s decade. As of the start of 1711, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.

In the Swedish calendar it was a common year starting on Sunday, one day ahead of the Julian and ten days behind the Gregorian calendar.