Mike De Decker (born 15 December 1995) is a professional Belgian darts player who plays in Professional Darts Corporation (PDC) events.
He won two PDC Development Tour events in 2015, followed by another one in 2016. He also won a PDC Tour Card in 2016.
After losing it at the end of 2017, De Decker went two years without a Tour Card, mainly playing on the Development and Challenge Tours and the odd European Tour. However, on 17 January 2020, he went all the way at European Q School to win back his Tour Card, beating Dennis Nilsson 5–3 in the final. He won his first World Championship match in the 2022 World Darts Championship, his opponent was Darius Labanauskas.