The women's C-1 slalom canoeing event at the 2020 Summer Olympics took place on 28 and 29 July 2021 at the Kasai Canoe Slalom Course. 22 canoeists from 22 nations competed. The event was won by Jessica Fox from Australia, who already had three medals (one silver and two bronzes) in K-1 slalom from the 2012, 2016, and 2020 Olympics. Briton Mallory Franklin won silver, and German Andrea Herzog bronze. For both of them it was the first Olympic medal.