[1] Margrét Kara started her senior career with Njarðvík in the Úrvalsdeild kvenna during the 2003–2004 season before joining Keflavík in 2005.
[6] She was named the best player of the first half of the 2008–2009 season[7] and helped KR reach the Úrvalsdeild finals[8] where it lost to Haukar 2-3.
Due to the disciplinary court taking a week to review the incident, she was able to play in KR's first round playoffs series against Snæfell where she averaged 23.0 points and 5.0 rebounds in the two-game sweep.
[18] She had a strong comeback year with Stjarnan, averaging 10.9 points, 12.5 rebounds and 4.1 assists, and was selected to the national team during the summer of 2016.
[20] On 8 September 2019, Benedikt Guðmundsson, the head coach of KR, confirmed that she was training with the club with the possibility signing with the team.