The Museum of the Second World War is a state cultural institution and museum established in 2008 in Gdańsk, Poland, which is devoted to the Second World War. Its exhibits opened in 2017.

Gdańsk is a city on the Baltic coast of northern Poland. With a population of 486,492, Gdańsk is the capital and largest city of the Pomeranian Voivodeship. It is Poland's principal seaport and the country's fourth-largest metropolitan area. The city lies at the southern edge of Gdańsk Bay, close to the city of Gdynia and resort town of Sopot; these form a metropolitan area called the Tricity (Trójmiasto), with a metropolitan population of approximately 1.5 million. Gdańsk lies at the mouth of the Motława River, connected to the Leniwka, a branch in the delta of the Vistula River, which connects Gdańsk with Warsaw.