IK Sirius is a Swedish bandy club located in Uppsala, currently playing in Elitserien.

In the first year of bandy league system in Sweden, 1930–31, Sirius entered in Division 1 Norra together with AIK, Hammarby IF, IF Vesta, IFK Rättvik, Skutskärs IF, SK Tirfing, and Västerås SK and finished 5th.

In 1966 IK Sirius BK won the league for a fourth time but lost the title to Örebro SK the following year.

They regained the title for the 5th and currently last time in 1968 beating Örebro SK in the final match.

In 2008–09 Sirius had their best season in two decades, finishing 3rd in Elitserien and lost to Edsbyns IF in the semi-final off the play-offs.