Chantal Groot (born 19 October 1982 in Amsterdam) is a butterfly and freestyleswimmer from the Netherlands, who has represented her country in many international championships since 1999. The best distance of Chantal Groot is the 50 m butterfly in which she won five European LC Championships medals, for the first time in 1999 in Istanbul, and became European Champion in 2008 in Eindhoven.
In 2000 she competed in the 2000 FINA Short Course World Championships in Athens where an 11th place in the 50 m butterfly was her best result. At the 2000 European Aquatics Championships in Helsinki she was in the finals of all three relay events but did not won a medal. Individually a 7th place in the 100 m butterfly was her best performance. Groot was also selected to take part in the 2000 Summer Olympics in Sydney. She swam in the heats of the 4×100 m freestyle but was replaced for the final by Inge de Bruijn, but still received a silver medal for her efforts in the heats. Individually she reached the semi-finals of the 100 m butterfly ending up 11th. In the two other relays there was no success.
In March 2008 Groot competed in her homecountry at the 2008 European Aquatics Championships where she finally became European Champion in the 50 m butterfly beating teammate Inge Dekker in the final, after having won the bronze medal four times in this event. In the 100 m butterfly she finished up 5th and qualified for the 2008 Summer Olympics. She started in the heats of the 4×100 m freestyle and 4×100 m medley but was replaced for the finals each time. In the second week of April she participated in the 2008 FINA Short Course World Championships in Manchester. She started individually in the 100 m butterfly and reached a 6th place. She also swam in the heats of the 4×100 m medley but was replaced in the final by Inge Dekker. The Olympic Games in Beijing were a disappointment because she ended 30th in the 100 m butterfly.