Several days ago Krawczyk left hospital, where he had been taken with the coronavirus.
State news agency PAP reported that he died from COVID-19 complications exacerbated by his underlying medical conditions.
Krawczyk's artistic career spanned over 50 years. He travelled widely on concert tours in Europe and further afield, and had a string of hits.
He was a versatile performer, reaching for a variety of genres, from pop through R&B, swing, soul, jazz, rock'n'roll and country.
He was also capable of wowing audiences with Christmas carols, religious and folk songs, as well as reggae and gypsy music, and even found himself dubbed the "Polish Elvis."
He made his debut in 1963 with the cult Trubadurzy (Troubadours) band. He debuted as a solo performer in 1971.
From 1980, he spent years living and performing in the United States, especially in Las Vegas.
In 2000, he sang before Polish-born Pope John Paul II in St. Peter's Square. A survey found he was the most popular Polish singer at the time.
Prime Minister Mateusz Morawiecki paid tribute to Krawczyk, writing on social media: "There is probably no-one in Poland who does not know his work. Thank you for that. Rest in peace."