The 2015 season was Breiðablik's 30th season in Úrvalsdeild and their 10th consecutive season in top-flight of Icelandic Football. Along with the Úrvalsdeild, the club competed in the Lengjubikarinn and Borgunarbikarinn. The 2015 season was Arnar Grétarsson's first season as head coach of Breiðablik after being appointed on 8 November 2014. On 23 April Breiðablik won the Icelandic league cup, Lengjubikarinn, after a 1–0 win against KA. This was their 2nd Lengjubikar title in the last 3 years.