Ondrej Karlovský (born 10 July 1991 in Hradec Králové) is a Czech slalom canoeist who has competed at the international level since 2006.
He won two medals in the C2 team event at the ICF Canoe Slalom World Championships with a gold in 2013 and a bronze in 2014.
He also won three silver and four bronze medals at the European Canoe Slalom Championships.His partner in the C2 boat is Jakub Jáne.