Hindrik Harmannus Arnoldus "Henk" Grol (born 14 April 1985 in Veendam) is a retired Dutch judoka.

Grol competed in the 2007 European Judo Championships in Belgrade, Serbia in the men's under 90 kg, as a replacement for Mark Huizinga, who cancelled last minute due to personal problems.

After a highly competitive race against Elco van der Geest, Grol ended up being the 2008 representative for the men's 100 kg category for the Netherlands at the 2008 Olympics in Beijing.

[2] In 2021, he won one of the bronze medals in his event at the 2021 Judo World Masters held in Doha, Qatar.

[3][4] After the 2016 Olympics in Rio de Janeiro he considered starting a mixed martial arts career and trained with Gegard Mousasi in Amsterdam.