Stefán Þór Þórðarson (Anglicised Stefan Thor Thordarson; born 27 March 1975) is an Icelandic former footballer who played as a striker for ÍA Akranes, Östers IF SK Brann, Kongsvinger IL, KFC Uerdingen, Stoke City, IFK Norrköping and FC Vaduz as well as the Iceland national team.