Bruno Wilhelm Heinrich Claußen (15 February 1884 – missing since May 1945) was a German lawyer and civil servant who was the Prussian State Secretary for Economics and Labor in the first year of the Third Reich.

He entered the Prussian judicial service as a legal clerk in Schleswig-Holstein, and served as a government Assessor at the courthouse in Kempen between 1911 and 1914.

On 11 March 1920 he was made a Ministerialrat (Ministerial Councilor) in the Reich Commissariat for the Occupied Rhineland Area.

[1][2] On 22 February 1933, less than a month after the Nazi seizure of power, Claußen was appointed Secretary of State in the Prussian Ministry of Economics and Labor under Minister Alfred Hugenberg, the leader of the German National People's Party.

[3][4] Claußen held no further political posts and entered the business world, becoming chairman of the supervisory boards of the Zündwaren monopoly safety match company in Berlin, the Dyckerhoff [de] portland cement works in Mainz and the G. Kärger Machine Tool Factory in Berlin (since 1949, part of BWF Marzahn [de]).