The Treaty of Stuhmsdorf or Sztumska Wieś,…

The Treaty of Stuhmsdorf or Sztumska Wieś, signed on September 12, 1635 between the Polish–Lithuanian Commonwealth and Sweden in the village of Stuhmsdorf (Sztumska Wieś), Royal Prussia, just south of Stuhm (Sztum), introduces a truce for twenty-six and a half years.

Sweden, weakened by its involvement in the Thirty Years' War, agrees to the terms that are mostly favorable to the Commonwealth in terms of territorial concessions.

The Commonwealth regains many of the territories it had lost in the past decades of the Polish–Swedish War, but the treaty is also beneficial to Sweden and her allies (France, England and the Dutch Republic), which want Sweden to be able to concentrate on the Thirty Years' War in the Holy Roman Empire, without the need to worry about possible conflict with the Commonwealth.