Wilhelm "Will" Decker (13 December 1899 in Rostock – 1 May 1945 near Berlin) was a German publicist, and in the time of the Third Reich the General Labour Leader.
After his Abitur, he served at the front in 1917–1918 in the First World War and afterwards studied history and Germanistics between 1919 and 1922.
From 1931, at the Voluntary Labour Service, Nazi leaders appointed him as "Inspector for Education and Training" in the Reich leadership.
Alongside this, Decker had a teaching job at the University of Berlin, and was appointed an honorary professor in June 1937.
In 1961, The West Berlin denazification court confiscated property worth $400 from Decker, which were used towards compensation of Nazi victims.