Sara Björk Gunnarsdóttir (born 29 September 1990) is an Icelandic footballer who plays for VfL Wolfsburg of the German Frauen-Bundesliga.
She previously played for Swedish Damallsvenskan club FC Rosengård.
Sara Björk has been part of Iceland's national team since 2007 and represented her country at the 2009, 2013 and 2017 editions of the UEFA Women's Championship.
In December 2018, she was named the Icelandic Sportsperson of the Year.