1621
| Years: 1618 1619 1620 - 1621 - 1622 1623 1624 | |
| Decades: 1590s 1600s 1610s - 1620s - 1630s 1640s 1650s | |
| Centuries: 16th century - 17th century - 18th century 1621 in literature 1621 in science | |
Events
- February 9 - Gregory XV is elected pope.
- February 17 - Miles Standish is appointed as first commander of Plymouth Colony
- March 22 - The Pilgrims of Plymouth Colony sign a peace treaty with Massasoit of the Wampanoags.
- March 16 - Samoset, a Mohegan, visits the settlers of Plymouth Colony and greets them, "Welcome, Englishmen! My name is Samoset."
- April 5 - The Mayflower sets sail from Plymouth on a return trip to Great Britain.
- The Swedish city of Gothenburg is founded by Gustavus Adolphus
- Riga falls under rule of Sweden
Births
- March 31 - Andrew Marvell, British poet.
Deaths
- January 28 - Pope Paul V
- February 15 - Michael Praetorius, German composer (born in 1571/1572)
- March 31 - King Philip III of Spain
- Cristofano Allori, Italian painter
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