Franz Wenzel Graf of Kaunitz-Rietberg (July 2, 1742 in Vienna – December 19, 1825 in Vienna) was an Austrian general who saw service in the Seven Years' War and Wars of the French Revolution.
Kaunitz was the third son of the statesman Wenzel Anton von Kaunitz-Rietberg and Mary Ernestine (née Countess Starhemberg). He remained unmarried.
Kaunitz was given a military education and volunteered to join the Austrian army at the beginning of the Seven Years' War as an ensign in the Trautmannsdorf Cuirassiers. He transferred to the Daun Infantry Regiment in 1759, and under Field Marshal Leopold Joseph von Daun rose to the position of Wing Adjutant, distinguishing himself at the Battle of Torgau, where he was severely wounded. After the peace of Hubertusburg 1763 he was promoted Colonel of the Baden Infantry Regiment (IR) (later IR.23), and then in 1766 of the Emperor Joseph II Infantry Regiment (later IR.1). In 1773 he was promoted General-Major. In the same year he was appointed Inhaber (Proprietor) of IR.38, followed in 1785 by IR.20. Promoted Feldmarschall-Leutnant (FML) in 1783, he served as military commander in Croatia.
At the beginning of the Wars of the French Revolution, he was made Feldzeugmeister (FZM) in the Austrian Netherlands under Prince Josias of Saxe-Coburg-Saalfeld and served in the Flanders Campaign. Commanding Coburg's 27,000 man left wing, Kaunitz distinguished himself defending the line of the River Sambre in 1794, beating off Jacques Desjardin and Louis Charbonnier at the Battle of Grandreng on 13 May before completely routing the French at the Battle of Erquelinnes on 24 May. However he resigned on 30 May after the Prince of Orange was appointed over his head for political reasons. Kaunitz commanded a column at the Battle of Fleurus on 26 June.