1720 was a leap year.
|Centuries:||17th century – 18th century – 19th century|
|Decades:||1690s 1700s 1710s – 1720s – 1730s 1740s 1750s|
|Years:||1717 1718 1719 – 1720 – 1721 1722 1723|
- The Town on Queen Anne's Creek, North Carolina is renamed Edenton in honor of North Carolina Governor Charles Eden. It is later incorporated in 1722.
- The Tuscarora fled North Carolina as a result of European colonisation
- Edmond Halley appointed Astronomer Royal
- The Academia Real da Historia is founded in Lisbon, Portugal
- Jonathan Swift begins Gulliver's Travels
- Emperor Kangxi announced that all western businessmen could only trade in Guangzhou.