Niarchos may refer to:
Philip Niarchos (born 1954), eldest son of the Greek shipping magnate Stavros Niarchos Spyros Niarchos (born 1955), second son of the Greek shipping magnate Stavros Niarchos Stavros Niarchos (1909–1996), Greek shipping tycoon Stavros Niarchos Foundation, established in 1996 to honor Greek shipping magnate Stavros Niarchos Stavros S Niarchos, a British brig-rigged tall ship owned and operated by the Tall Ships Youth Trust Victoria Niarchos (born 1960), member of the non-aristocratic branch of the Guinness beer clan Niarchos (spider), a genus of goblin spiders