Otto Wegemund (1870 – 5 October 1928) was a German chess master.
He participated many times in Berlin City Chess Championship ; (Ernst Schweinburg won), tied for 5-6th in 1924 ( Carl Ahues won), tied for 7-8th in 1920 ( Erich Cohn won), took 10th in 1908 ( Wilhelm Cohn won) (Ahues and Richard Teichmann won), shared 4th in 1925 ( Friedrich Sämisch won), and tied for 9-10th in 1927 ( Berthold Koch won). 
He also played several times in the DSB Congress . ( Hauptturnier B , Hans Fahrni won), took 9th at Breslau 1912 ( Hauptturnier B , Paul Krüger won), shared with Wilhelm Hilse at Hamburg 1921 ( Hauptturnier B ), tied for 8-10th At Bad Oeynhausen 1922 ( Ehrhardt Post won),  and took 8th at Frankfurt 1923 ( Ernst Grünfeld won). 
In other tournaments, He Took 5th at Berlin 1917 ( Walter John and Paul Johner won),  Took 2nd, behind John, at Breslau 1918  and Took 11th at Berlin 1920 ( Alexey Selezniev won).
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