Karel Růžička (born 11 May 1909; date of death unknown) was a Czechoslovakian bobsledder who competed in the 1930s.

He won a silver medal in the two-man event at the 1935 FIBT World Championships in Igls.

Ruzicka also competed at the 1936 Winter Olympics in Garmisch-Partenkirchen, finishing 20th in the two-man event and did not finish the four-man event.

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