Hans Heinrich Lammers 27 May 1879 – 4 January 1962 was a German jurist in addition to prominent Nazi politician. From 1933 until 1945 he served as Chief of the Reich Chancellery under Adolf Hitler. During the 1948–1949 Ministries Trial, Lammers was found guilty of war crimes and crimes against humanity and sentenced to 20 years' imprisonment.
In April 1946, Lammers was a witness at the Nuremberg trials. Starting in April 1949, he was tried in the Ministries Trial, one of the subsequent Nuremberg trials, and was sentenced to 20 years in prison. The sentence was later commuted to 10 years by US High Commissioner John J. McCloy, and, at some date between 1951 and 1954, he was released from Landsberg Prison. Lammers died on 4 January 1962 in Düsseldorf and was buried in Berchtesgaden in the same plot as were his wife and daughter.