Berglind Björg debuted for Iceland U17 on September 17, 2007, in a match against Latvia for the 2008 UEFA Women's Under-17 Championship. She participated in all the six matches Iceland played in the competition. Berglind Björg also represented Iceland at the 2009 UEFA Women's Under-17 Championship. On April 24, 2008, she started to play for the Iceland U19 team. Her first match was against Belgium in the 2008 UEFA Women's Under-19 Championship Qualification. Berglind Björg also represented Iceland at the 2009 UEFA Women's Under-19 Championship, 2010 UEFA Women's Under-19 Championship Qualifying Rounds and 2011 UEFA Women's Under-19 Championship Qualifying Rounds. In 2010, Berglind Björg was called for the 2010 Algarve Cup and debuted in Iceland's first match in the competition on February 24 against the United States. She also represented Iceland at the 2011 Algarve Cup, 2016 Algarve Cup (when Iceland finished third) and 2017 Algarve Cup. On April 6, 2017, in a match against Slovakia, Berglind Björg scored her first international goal. On June 22, 2017, she was included by coach Freyr Alexandersson on the squad that represented Iceland at the UEFA Women's Euro 2017.