Steinþór Freyr Þorsteinsson (born 29 July 1985) is an Icelandic footballer who currently plays for KA in the Úrvalsdeild.
He is known for his outstanding athleticism and long throw-ins.
He was voted the best player of the first seven rounds of the Icelandic deild in both 2009 and 2010.On 31 July 2010 he signed a ?2 1/2-year contract with Örgryte IS, but was released when the club went bankrupt in early February 2011.
In March 2011 he signed a one-year contract with Norwegian club Sandnes Ulf.
At Sandnes Ulf, Steinþór has shown an amazing skill to win penalties and free kicks.
In his first 9 games for the team, he had already won 6 penalties for the team.