Decimus

Decimus may refer to:

Romen praenomen

 * Decimus (praenomen)
 * Decimus Carfulenus (died 43 BC), Roman statesman
 * Decimus Haterius Agrippa (died 32 AD), consul in 22 AD
 * Decimus Junius Brutus (consul 77 BC)
 * Decimus Junius Brutus Albinus (c. 81 BC–43 BC), Roman politician and general, assassin of Julius Caesar
 * Decimus Junius Brutus Callaicus (180 BC–113 BC), Roman politician and general
 * Decimus Junius Silanus Torquatus (16 AD–64 AD), consul in AD 53
 * Decimus Junius Silanus (consul)
 * Decimus Junius Silanus (translator of Mago)
 * Decimus Laberius (c. 105 BC–43 BC), Roman eques and writer
 * Decimus Laelius, Roman lawyer and tribune of the plebs
 * Decimus Laelius Balbus, consul in 6 BC
 * Decimus Valerius Asiaticus (c. 5 BC–47 AD), Roman senator
 * Decimus Valerius Asiaticus (Legatus) (35-after 69 AD), Roman senator, Legatus of Gallia Belgica
 * Ausonius (Decimus Magnus Ausonius, c. 310–c. 395), Roman poet and rhetorician
 * Balbinus (Decimus Caelius Calvinus Balbinus, c. 165–238), Roman emperor in 238
 * Clodius Albinus (c. 150–197), Roman usurper
 * Juvenal (Decimus Junius Juvenalis), poet of the 1st century AD

Given name

 * Decimus Burton (1800–1881), English architect
 * Decimus Govett (1827–1912), Anglican priest

Pen-name

 * Thomas Chatterton (1752–1780), English poet