Johann Philipp Carl Joseph Stadion, Count von Warthausen (18 June 1763 in Mainz – 15 May 1824, Baden) was a statesman, foreign minister, and diplomat who served the Habsburg empire during the Napoleonic Wars.
He had greater success as envoy at Saint Petersburg (1803–1805), where he played a large part in the formation of the third coalition against Napoleon (1805).
Notwithstanding the failure of this alliance, he was made foreign minister and, in conjunction with Archduke Charles of Austria, pursued a policy of quiet preparation for a fresh trial of strength with France.
Nonetheless, the French recovered and inflicted a decisive defeat on the Austrians at Wagram, one of the largest battles of the Napoleonic Wars.
The last ten years of his life were spent in a strenuous and partly successful attempt to reorganize the disordered finances of his country.