In Jenbach housings could be found which date back to the end of the early Bronze Age and of the early La-Tène-Age. Jenbach was first officially named in a document of the year of 1269 as "Ymbach". From 1410 onwards the Fugger constructed melting furnaces in order to proceed the silver and copper won in the mines near Schwaz. After these mines could no more deliver these resources Jenbach started to work on iron. Until 1865 these early industrial infrastructure remained private, however afterwards the state took ownership. In 1870 the factory was resold to the Salzburg-Tiroler-Montangesellschaft. In 1881 Julius & Theodor Reitlinger purchased it from this company and modernised it. The company remained a possession of the family until 1938, when the son of Julius Reitlinger, Friedrich Reitlinger, committed suicide due to the Anschluss (the merging of Germany and Austria) in 1938. Afterwards it was taken over by the state and later resold to Ernst Heinkel (Aryanization). After 1945 the company was not restituted to its former owners, but remained under public administration.
In February 1945 31 tons of bombs were cast upon the railway station during the Operation Clarion in order to prevent the Reichsbahn from transporting war-material. This was necessary for the impeding invasion of Germany and Austria. The air attack on Jenbach destroyed 35 houses and left 8 people dead.
During the war the Heinkel-factories produced motors for the Me-163, the first engine-powered airplane, and other parts for the V-2 missiles fired at southern English cities during the summer of 1940.
In April and May, remainders of SS-units, among them the main staff of the SS-Reichsführer Heinrich Himmler, withdrew from the quickly advancing French units commanded by Charles de Gaulle, to Tyrol, where Nazi propaganda had virtually inscenerated a "fortress in the Alps". SS-commanders ecouraged their soldiers to fight "to the last bullet". Direct infenteristic
