Heinrich Bretthorst (16 December 1883 in Rahden died 17 September 1962 in Leipzig) was a German politician (SPD / SED).
After the outbreak of the First World War, he was drafted into military service and was awarded the Iron Cross second class.
After the takeover by the Nazis Horst was in custody from 1933 to 1934, including as a prisoner in the KZ Wroclaw Dürrgoy and then was unemployed until 1938.
By the end of World War II, he was in Leipzig from April to October of the year, where he found employment in the Police Department, provided to him by Heinrich Fleißner.
Since 15 November 1945, he was a member of the General District Executive Chairman of the SPD Leipzig and Borna subdistrict.
In 1947 he was elected joint chairman, replacing Stanislaw Trabalski, of the Personnel Policy Division of the SED district executive in Leipzig.
After the dissolution of the provincial governments he became a Member of the Leipzig district assembly in 1952, which he opened as interim president.