The drawings were handed over to ministry officials and delegates of the Warsaw museum at a ceremony in Poland's Consulate-General in New York on Wednesday, the Polish state news agency reported.
Drawn by the late-19th century artist Adolf Kozarski, the two small-town landscapes had been part of a larger batch purchased by Warsaw's National Museum in 1925.
A total of three drawings were subsequently lost amid the chaos of war.
However, in 2019 the US-based Monuments Men Foundation for the Preservation of Art found two of these in the possession of the family of a late US Army officer, who had brought them as mementoes of military service in war-torn Europe, PAP reported.
Polish museum officials have since confirmed them to be the lost drawings by Kozarski.
On November 8, Polish Deputy Prime Minister Piotr Gliński, accompanied by US diplomats, will officially hand the works to the National Museum at a ceremony in Warsaw, the Polish culture ministry said.
It added that more such artefacts remained in private US collections after being taken overseas by American troops in memory of their service in Europe during World War II.
The Polish culture ministry also said that in recent years, thanks to cooperation with American federal agencies such as the FBI and Homeland Security Investigations (HSI), Poland has regained valuable works of art, including Portrait of a Lady by Melchior Geldorp and Robert Śliwiński's Street with Castle Ruins.
(pm/gs)
Source: PAP