She died in Season 5, Episode 15 Gone Girl next to her daughter Nadia Petrova, who died of a werewolf bite.
Does Katherine Pierce die in Vampire Diaries?
The Vampire Diaries co-creator Julie Plec has revealed why antagonist Katherine Pierce was killed off in season 5. The series, based on the books of the same name, premiered on The CW in September 2009.
Does Katherine die in Season 8?
However, Stefan is able to override the compulsion because he had vervain in his system and then hurries back into the tunnels, where he injects a syringe filled with his blood into Damon, making him human and then dies while making sure Katherine is in hell while her body is destroyed.