Gierłoż (pronounced g(i)-ER-wuzh [ˈɡʲɛrwɔʂ]) is a village in the administrative district of Gmina Kętrzyn, within Kętrzyn County, Warmian–Masurian Voivodeship, in north-east Poland.

In 1454 King Casimir IV Jagiellon incorporated the village and region to the Kingdom of Poland upon the request of the Prussian Confederation, and after the subsequent Thirteen Years' War (1454–1466) it was part of Poland as a fief held by the Teutonic Knights.

During World War II, Adolf Hitler's military headquarters from June 21, 1941, to November 20, 1944, were situated here in a bunker, called the Wolf's Lair.

After the 1945 defeat of Nazi Germany in the war, the village along with Masuria became again part of Poland.

This Kętrzyn County location article is a stub.