Baron Franjo Jelacic Bužimski (English: Franz Jellacic, also Francis Yellachich of Buzhim or German: Franz Jellacic von Buzim, Hungarian: Ferenc Jellacsics de Buzim) (14 April 1746 – 4 February 1810) was a Croatian nobleman, a member of the House of Jelacic.
He began his service in the Habsburg army as a Grenz infantry officer and fought against the Ottoman Turks.
During the French Revolutionary Wars he received promotion to the rank of general officer and won an outstanding victory at Feldkirch.
His later career proved that his martial abilities were limited.
He twice led independent division-sized forces in the Napoleonic Wars, with unhappy results.
He was Proprietor (Inhaber) of an Austrian infantry regiment from 1802 until his death.