Dietrich Graf (Count) von Hülsen-Haeseler (February 13, 1852 in Berlin, Germany – November 14, 1908 in Donaueschingen, Baden-Württemberg, Germany) was an infantry general of the German Empire.
The son of a Prussian general, Dietrich von Hülsen-Haeseler in 1870 became a lieutenant in the Prussian Emperor Alexander Guards Grenadiers.
He attended the War College and was attached to the German General Staff in 1882.
In 1889 he was made aide de camp to Kaiser Wilhelm II, whom he had known since boyhood.
In 1894 von Hülsen-Haeseler was named military attaché at the German embassy in Vienna.
In 1897, now a colonel, he returned to Berlin as commander of a guards regiment.
In 1899 he was promoted to major general, made chief of general staff in the Guards Corps, and then given command of the 2nd Guards Infantry Brigade.
From May 1901 until his death in November 1908 von Hülsen-Haeseler served as Chief of the German Imperial Military Cabinet, during which time he rose to General of Infantry.