Marcus Postumius Albinus Regillensis was an ancient Roman politician belonging to the patrician Postumia gens.
Postumius relationship to later Postumii Albini remains unknown as filiations are missing from the consular tribunes and consuls of 397, 394 and 334 BC.
[2] In 426 BC Postumius was elected together with Titus Quinctius Poenus Cincinnatus, Gaius Furius Pacilus Fusus and Aulus Cornelius Cossus as consular tribune.
The year saw war against the Veii and Fidenae which resulted in the appointment of a dictator, Mamercus Aemilius Mamercinus.
The war ended with the defeat of both the Veii and the capture of Fidenae, resulting in a triumph celebrated by Aemilius.