Heinrich Friedrich Graf[a] von Arnim-Heinrichsdorff-Werbelow (23 September 1791 – 18 April 1859) was a Prussian statesman.
Arnim participated in the War of the Sixth Coalition and then embarked on a diplomatic career.
He encouraged the King to grant concessions to liberals and support German unification under Prussian leadership.
He sought with little success to gain French and British support for the creation of the German national state, and for the restoration of Polish independence.
From 1851 to 1857 he was once again Prussian ambassador to Vienna, he cultivated good relations with Austria as much as possible, which he saw as an indispensable ally of Prussia.