Chantal Groot (born 19 October 1982) is a butterfly and freestyle swimmer from the Netherlands, who has represented her country in many international championships since 1999.

Groot immediately won her first international medal, a silver, in the 4×100 m freestyle relay together with Thamar Henneken, Wilma van Hofwegen and Inge de Bruijn.

In the 50 m butterfly she won her first individual medal, at the age of 17, reaching third place behind Anna-Karin Kammerling and Johanna Sjöberg.

In December 2002 she won two bronze medals at the European Short Course Swimming Championships 2002 in the 4×50 m freestyle and 4×50 m medley relay.

2004 started for Groot with the 2004 European Aquatics Championships in Madrid where she achieved to win three medals, silver in the 4×100 m freestyle alongside Inge Dekker, Annabel Kosten and Marleen Veldhuis.

2005 wasn't a fantastic for Groot with a 4th place in the 4×100 m freestyle and 9th in the 50 m butterfly during the 2005 World Aquatics Championships in Montreal, Quebec, Canada.

At the end of the year she won the gold medal for the third time in a row in the 4×50 m freestyle at the European Short Course Swimming Championships 2005.

Together with Inge Dekker, Hinkelien Schreuder and Marleen Veldhuis, Groot set a world record and won a gold medal in the 4×100 m freestyle relay in a time of 3:33.32.