Vlahos or Vlachos (Greek: Βλάχος [ˈvlaxo̞s]), feminine: Vlahou, is a Greek surname, meaning Vlach.
The surname Vlahos/Vlachos may refer to:
Petro Vlahos, Greek-American engineer, bluescreen/special effects pioneerAlexander Vlahos, Greek-Welsh actor, known for playing Mordred on MerlinAnestis Vlachos,Greek actor and producer
Eros Vlahos, Greek-English actor, known from Game of ThronesHelen Vlachos, Greek journalist and newspaper editor in the 60's, daughter of GeorgiosGeorgios Vlachos, Greek journalist, creator of Kathimerini, a daily newspaper in GreeceLeesa Vlahos, Greek-Australian politicianMichalis Vlachos, Greek footballerTerpsichori Chryssoulaki-Vlachou, Greek WWII resistance memberTony Vlachos, winner of Survivor: CagayanVangelis Vlachos, Greek footballerWilliam Vlachos, Greek-American footballerZachary Vlahos, Greek-American Olympic rower