Malewicz had lived in the United States for more than six decades after emigrating from Poland in 1965.
As a 16-year-old, he fought in the Warsaw Uprising against Poland's German occupiers, including in the Gozdawa Battalion in the Old Town, where he was wounded, Polish officials said.
He was awarded several Polish honours, including the Cross of Valor and the Polonia Restituta Order.
Poland’s consul general in New York, Mateusz Sakowicz, described Malewicz as an exceptional witness to history and a hero of the World War II revolt against Nazi German forces.
"He was our special guest during the anniversary of the outbreak of the Warsaw Uprising. As a witness to history, he shared his memories,” Sakowicz said. "He was a true hero who spoke about his heroic deeds in a very down-to-earth way."
Mateusz Sakowicz and Jerzy Malewicz attend the anniversary event in New York last year. Photo: Danuta Isler/Polish Radio
Sakowicz also noted Malewicz's vivid memory and storytelling, saying that "he shared his experiences very openly and had a great sense of humor."
Jerzy Malewicz, pictured in August 2025, with his daughters and grandchildren. Photo: Danuta Isler/Polish Radio
Malewicz was visited in New York in January by Warsaw Mayor Rafał Trzaskowski.
"It is deeply saddening when another witness to history passes away," Sakowicz said.
Jerzy Malewicz (centre) with American journalist Rita Cosby (left) and Anna Maria Anders (right), daughter of Polish WWII military leader Gen. Władysław Anders. Photo: Danuta Isler/Polish Radio
Click on the audio player above to hear a 2025 interview with Jerzy Malewicz and his family.