Karl August Fürst von Hardenberg (May 31, 1750 – November 26, 1822) is a Prussian statesman and Prime Minister of Prussia.

While during his late career he acquiesces to reactionary policies, earlier in his career he implements a variety of liberal reforms.

To him and Baron vom Stein, Prussia is indebted for improvements in its army system, the abolition of serfdom and feudal burdens, the throwing open of the civil service to all classes, and the complete reform of the educational system.