Hans Karl Georg von Kaltenborn-Stachau (23 March 1836 in Magdeburg – 16 February 1898 in Braunschweig) was a Prussian General of the Infantry and Minister of War.
He belonged to the aristocratic Kaltenborn-Stachau family, and was raised in the cadet corps, before joining the 27th Infantry Regiment as a second lieutenant in 1854.
Kaltenborn-Stachau participated in the Second Schleswig War in 1864 and in December was transferred to the general staff of the VI Army Corps.
In July of that year he was made commander of the 2nd Guards Infantry Division and was simultaneously promoted to lieutenant general.
In 1893, under his leadership a plan was enacted whereby the army was expanded by 70,000 men, and the length of service was increased to two years.