Margrét Lára Viðarsdóttir (born 25 July 1986) is an Icelandic former footballer who played in the striker position. She is the all-time top goalscorer of the Iceland national team and competed for her country at the UEFA Women's Championships in 2009 and 2013. In a club career sometimes disrupted by injury, Margrét Lára represented ÍBV and Valur of the Icelandic Úrvalsdeild, Duisburg and Turbine Potsdam of the Frauen-Bundesliga, and Linköpings and Kristianstads DFF of the Damallsvenskan. Margrét Lára is the elder sister of Elísa Viðarsdóttir, who also played for Iceland's national team.