The 1920 Copa Ibarguren was the 8h. edition of this national cup of Argentina. It was played by the champions of both leagues, Boca Juniors (Primera División of dissident league Asociación Amateurs de Football), and Tiro Federal (Liga Rosarina de Football), crowned during 1920. After the first match (where Boca Juniors had won 2–1) was annulled, Tiro Federal beat Boca Juniors 4–0 in the replay match at Boca Juniors Stadium.