KR is the oldest[1] and most successful club in Icelandic football, having won the Besta deild karla championship 27 times, including the first season in 1912.

KR's women's team was also the first Icelandic contender in Europe, entering the inaugural European Competition in 2001.

[2] In KR's centenary year in 1999 the team ended its long quest for another national title.

They clinched the title with a 4–0 win over Víkingur in the penultimate round and then beat ÍA 3–1 in the cup final in front of a capacity crowd at the national stadium.

The women's team was equally successful, winning the league and the cup, and KR celebrated its centenary year with an unprecedented double-double.

Besides football, which is the original sport for which the club was founded, KR today also practices basketball, badminton, table tennis, bowling, darts, team handball, skiing, Icelandic wrestling and swimming.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.