Jakub Grigar (born 27 April 1997 in Liptovský Mikuláš) is a Slovak slalom canoeist who has competed at the international level since 2012.
He won a silver medal in the K1 team event at the 2015 ICF Canoe Slalom World Championships in London.Grigar finished 5th in the K1 event at the 2016 Summer Olympics in Rio de Janeiro.