1639Centuries: 16th century - 17th century - 18th century
- January 14 - Connecticut's first constitution, the "Fundamental Orders," is adopted
- March 13 - Harvard University is named for a clergyman named John Harvard.
- Charles I starts the first of the Bishops Wars against Scotland.
- The Casiquiare canal, a river forming a natural canal between the Amazon River and Orinoco River basins, is first encountered by Europeans.
- The Barbados House of Assembly meets for the first time.