Krzysztof Ratajski (born 1 January 1977) is a Polish professional darts player who plays in Professional Darts Corporation (PDC) events. His biggest achievement to date was winning the 2017 World Masters. Ratajski also plays on the Professional Darts Corporation's ProTour and has represented Poland at the World Cup of Darts on numerous occasions. He is the most successful darts player to come from Poland.