Oliver Masucci (born December 6, 1968) is a German actor. He gained international recognition for his portrayal of Adolf Hitler in the satirical film Look Who's Back (2015) and as Ulrich Nielsen in the Netflix series Dark (2017–2020). Other more recent film roles include Fantastic Beasts: The Secrets of Dumbledore (2022), Day Shift (2022) and The Palace (2023).

Masucci's performance as Rainer Werner Fassbinder in Enfant Terrible (2020) earned him the 2021 German Film Award (Lola) for Best Leading Actor. He also starred as Dr. Josef Bartok in the 2021 film adaptation of Stefan Zweig’s Schachnovelle, Chess Story, a performance that earned him the Bavarian Film Award for Best Actor.