Pasym ([ˈpasɨm]; German: Passenheim)[1] is a small town in Szczytno County, Warmian-Masurian Voivodeship, Poland, with a total population (as of 30 June 2016) of 2,556.

[2] In 1441 the town joined the Prussian Confederation, at which request in 1454 King Casimir IV Jagiellon signed the act of incorporation of the region to the Kingdom of Poland,[3] recognized the Polish king as rightful ruler and remained within Poland throughout the entire Thirteen Years’ War.

[6] In the East Prussian plebiscite of 1920 1,459 inhabitants voted to remain in Germany, 40 to join Poland.

[7] After World War II the region became again part of Poland by the Potsdam Agreement.

There is also a railway station serving a single-track line which splits around the central platform.