| Placidia | |
|---|---|
| Roman empress | |
| Tenure | 11 July – 2 November 472 |
| Born | 439–443 Rome |
| Died | c. 484 (aged 41–45) Constantinople |
| Spouse | Olybrius |
| Issue | Anicia Juliana |
| Dynasty | Theodosian Valentinianic |
| Father | Valentinian III |
| Mother | Licinia Eudoxia |
Placidia (Latin: [plaˈkɪdɪ.a]) was a daughter of Valentinian III, Roman emperor of the West from 425 to 455, and from 454/455 the wife of Olybrius, who became western Roman emperor in 472. She was one of the last imperial spouses in the Roman west, during the Fall of the Western Roman Empire during Late Antiquity.