| Franz Xaver Saint-Julien | |
| Birth Date: | 12 October 1756 |
| Death Place: | Skalička, Austrian Empire |
| Allegiance: | Habsburg monarchy, Austrian Empire |
| Branch: | Infantry |
| Serviceyears: | 1789[1] -1812 |
| Rank: | Feldzeugmeister |
| Battles: | French Revolutionary Wars War of the Fifth Coalition |
| Awards: | Inhaber of the Infantry Regiment N°61 Imperial-Royal Chamberlain |
| Relations: | Brother of Joseph Saint-Julien |
Franz Xaver Johann Nepomuk Graf Saint-Julien und Walsee (French: François-Xavier de Guyard, comte de Saint-Julien) (baptised 12 October 1756; died 16 January 1836 in Skalička)[2] was an Austrian infantry commander[3] during the French Revolutionary Wars and the War of the Fifth Coalition.