Karlsborgs Bandyklubb, Karlsborgs BK, is a bandy club in Karlsborg in Kalix Municipality, Sweden. The team colours are black and yellow. The club was founded on 26 April 1976, out of the bandy section of former sports club Karlsborgs IK, while the football department became Assi IF.

Karlbergs BK is a professional Swedish football club originating from Karlberg in Birkastaden, an area in the southwestern part of Vasastan in central Stockholm. As Vasastan has no full sized football pitches, the club relocated to neighbouring Kungsholmen and has the majority of its operations on the island.

Karlsborg locality situated in Kalix Municipality, Norrbotten County, Sweden with 351 inhabitants in 2010. Their bandy club Karlsborgs BK has played in the highest division.