Postumius can mean:
- Three consuls called Lucius Postumius Albinus:
- Lucius Postumius Albinus (consul 234 BC), ambushed by the Celtic Boii in 216 BC
- Lucius Postumius Albinus (consul 173 BC)
- Lucius Postumius Albinus (consul 154 BC)
- Lucius Postumius Megellus (4th-3rd centuries BC), two consuls of the gens Postumia
- Aulus Postumius Albinus, second consul in 99 BC
See also Postumus.