List of 1655 Major News Events in History, Most Important Historical Events in 1655
| Date | Event |
|---|---|
| February 14, 1655 | The Mapuches launch coordinated attacks against the Spanish in Chile beginning the Mapuche uprising of 1655. |
| March 25, 1655 | Saturn's largest moon, Titan, is discovered by Christiaan Huygens. |
| April 23, 1655 | The Siege of Santo Domingo begins during the Anglo-Spanish War, and fails seven days later. |
| May 19, 1655 | The Invasion of Jamaica begins during the Anglo-Spanish War. |
| July 31, 1655 | Russo-Polish War (1654–67): The Russian army enters the capital of the Grand Duchy of Lithuania, Vilnius, which it holds for six years. |
| August 23, 1655 | Battle of Sobota: The Swedish Empire led by Charles X Gustav defeats the Polish–Lithuanian Commonwealth. |
| September 8, 1655 | Warsaw falls without resistance to a small force under the command of Charles X Gustav of Sweden during The Deluge, making it the first time the city is captured by a foreign army. |
| December 18, 1655 | The Whitehall Conference ends with the determination that there was no law preventing Jews from re-entering England after the Edict of Expulsion of 1290. |
| December 27, 1655 | Second Northern War/the Deluge: Monks at the Jasna Góra Monastery in Częstochowa are successful in fending off a month-long siege. |