The Battle of Kliszów (also spelled Klissow or Klezow) took place on July 19, 1702, near the village of Kliszów in the Polish–Lithuanian Commonwealth during the Great Northern War. A Swedish army under the command of King Charles XII of Sweden defeated a Polish–Saxon army twice the size that was led by King Augustus II the Strong of Saxony.
During the second year of the war, following Swedish victories at Narva and Düna, Charles launched a campaign against the Polish-Lithuanian Commonwealth. In May 1702, Charles captured Warsaw, the Commonwealth's capital, where he received intelligence that Augustus was assembling a large Saxon army in Kraków. Charles chose to pursue Augustus and called for Swedish reinforcements. By July, after minor skirmishes and the arrival of his reinforcements, Charles was ready to attack Augustus's army, which had taken up a strong defensive position at Kliszów.
The battle began on July 9 with the Swedish army attempting to encircle the Saxon right wing. At the same time, the Polish Crown Army arrived to assist Augustus. The Swedish wings withstood attacks by the Saxon–Polish cavalry, which was driven from the battlefield. The Swedish cavalry and infantry were then able to jointly attack the Saxon infantry, which was forced to retreat. Augustus retreated to Sandomierz with his largely-intact army and retained control of large parts of Poland, but his military power was greatly weakened following the battle, which was a tactical and political victory for Charles.