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 pioneer
Alexander Vlahos, Greek-Welsh actor, known for playing Mordred on Merlin
Anestis Vlachos,Greek actor and producer
Eros Vlahos, Greek-English actor, known from Game of Thrones
Helen Vlachos, Greek journalist and newspaper editor in the 60's, daughter of Georgios
Georgios Vlachos, Greek journalist, creator of Kathimerini, a daily newspaper in Greece
Leesa Vlahos, Greek-Australian politician
Michalis Vlachos, Greek footballer
Terpsichori Chryssoulaki-Vlachou, Greek WWII resistance member
Tony Vlachos, winner of Survivor: Cagayan
Vangelis Vlachos, Greek footballer
William Vlachos, Greek-American footballer
Zachary Vlahos, Greek-American Olympic rower