Otto Fischbeck (28 August 1865 – 23 May 1939) was a German liberal politician, member of the Prussian and German parliament and Prussian Minister of trade and commerce from 1918 to 1921.

Fischbeck was born in Güntershagen, Province of Pomerania, Kingdom of Prussia (Lubieszewo, Poland), he studied economics and administrative sciences at the Universities of Berlin and Greifswald.

[1][2] From 1890 to 1895 he worked as a counsel at the chamber of commerce in Bielefeld and from 1895 to 1901 at the Employers Liability Insurance Association for paper processing industries in Berlin.

On 1 April 1918 he became the chairman of the municipal association of Greater Berlin.

[2] On 5 October 1918 he became the Prussian Minister for Trade and Commerce, a position he held until 1 November 1921.