Gaius Marcius Censorinus (died c. AD 2) was a Roman Senator who was elected consul in 8 BC.

[2] During his consulship, he offered votive games to Jupiter Optimus Maximus for the return of Augustus who was touring the provinces at the time.

[3] He also chaired the session of the Senate which voted to rename the month of Sextilis to August in honour of the emperor.

[6] It is conjectured that he was later the consular Legatus Augusti pro praetore (or imperial governor) of Galatia in around AD 2, where he hosted Gaius Caesar during his stay in the east.

[8][9] The poet Horace wrote an ode in his honour,[10] and he was praised by the Roman historian Marcus Velleius Paterculus as "vir demerendis hominibus genitus".