Johann Fortner (25 November 1884 – 26 February 1947) was a German Generalleutnant during World War II who commanded the 718th Infantry Division from its formation in May 1941 until he was relieved in March 1943.

The Nazi security warfare conducted by the division whilst under his command involved brutal and widespread massacres and burning of villages.

[1] He started the war as an Oberleutnant and was promoted to Hauptmann, commanded a company of his regiment and was awarded the Iron Cross 2nd and 1st Class.

Soon after he was released from internment in November 1919, Fortner transferred from the Reichswehr to the Bavarian State Police and over a period of 15 years rose to the rank of Polizei-Oberst (Police Colonel) before joining the Wehrmacht soon after its creation in 1935 with the rank of Oberst (Colonel), and was appointed as the commander of the Kassel military district.

Fortner was extradited to Yugoslavia after the war ended, tried and found guilty of the murder of Yugoslav civilians during his command of the 718th Infantry Division.