Jan-Krzysztof Duda is a Polish chess grandmaster, born on 26 April 1998 in Poland. He won the World Youth Championship in the under-10 category in 2008 and earned the grandmaster title in 2013 at the age of 15. In 2017 he became the first Polish junior to pass a FIDE rating of 2700.

Duda won the European Rapid Championship in 2014 and finished second at the 2018 World Blitz Championship, the same year he won the Polish Championship. In 2021 he won the FIDE World Cup and the European Blitz Championship. He played in the 2022 Candidates Tournament and won the Superbet Rapid & Blitz in Warsaw that year.