Aulus Postumius Tubertus was a Roman military leader in the wars with the Aequi and Volsci during the fifth century BC.
When it was decided to appoint a dictator to undertake the war with the Aequi and Volsci in 431, the consuls could not agree, and by lot the choice fell to Cincinnatus, who nominated his father-in-law.
The two men proceeded against the enemy, and on the 18th of June, won a great victory over the Aequi and Volsci at Mount Algidus.
This was the site of a previous victory over the Aequi by the dictator Lucius Quinctius Cincinnatus in 458 BC.
Livy doubted the truth of this account, noting that a similar and more infamous tradition was associated with Titus Manlius Torquatus, consul in 347, 344, and 340 BC.