Fifth Pierrot may refer to:
- Lemy Abelard, an assassin for Père Noël with the codename "Fifth Pierrot".
- The song by mothy titled "Fifth Pierrot".
- An unnamed member of Père Noël also possessing the codename "Fifth Pierrot".
- The light novel by mothy titled "Deadly Sins of Evil: Fifth Pierrot".
- The manga by Ichika titled "Fifth Pierrot".