|Centuries:||1st century BC – 1st century – 2nd century|
|Decades:||20s 30s 40s – 50s – 60s 70s 80s|
|Years:||51 52 53 – 54 – 55 56 57|
|54 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||807|
|Bahá'í calendar||-1790 – -1789|
|English Regnal year||N/A|
|Chinese calendar||癸丑年 (Water Ox)
2750 or 2690
— to —
甲寅年 (Wood Tiger)
2751 or 2691
|Coptic calendar||-230 – -229|
|- Vikram Samvat||110–111|
|- Shaka Samvat||N/A|
|- Kali Yuga||3155–3156|
|Igbo calendar||-946 – -945|
|Iranian calendar||568 BP – 567 BP|
|Islamic calendar||585 BH – 584 BH|
|Minguo calendar||1858 before ROC
|Thai solar calendar||597|
|Wikimedia Commons has media related to 54.|
Year 54 (LIV) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Lentulus and Marcellus (or, less frequently, year 807 Ab urbe condita). The denomination 54 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- October 13 – Roman emperor Claudius dies, possibly after being poisoned by Agrippina, his wife and niece, and is succeeded by Nero.
- Nero attempts to prohibit the gladiatorial games.
- Under Nero, Rome annexes Aden to protect the maritime route between Alexandria and Asia.
- Two centurions are sent to the south of Egypt to find the sources of the Nile, and possible new provinces. They report that while there are many cities in the desert, the area seems too poor to be worthy of conquest.
- Gnaeus Domitius Corbulo arrives in the East and take up an assignment as governor of Asia, with a secret brief from Nero and his chief ministers Seneca and Burrus to return Armenia to the Roman Empire.
- Corbulo inspects in Syria a base of Legio X Fretensis at Cyrrhus, the Roman legionnaires are demoralized by a "long peace". Many soldiers have sold their helmets and shields.
- Corbulo recruits Syrian auxiliary units in the region and stationed them in border forts, with orders from Nero not to provoke the Parthians.
- Violence erupts in Caesarea regarding the a local ordinance restricting the civil rights of Jews, creating clashes between Jews and pagans. The Roman garrison, made up of Syrians, takes the side of the pagans. The Jews, armed with clubs and swords, meet in the marketplace. The governor of Judea, Antonius Felix, orders his troops to charge. The violence continues and Felix asks Nero to arbitrate. Nero, sides with the pagans and relegates the Jews to second-class citizens. This decision does nothing but increase the Jews' anger.
- In Britain, Venutius leads a revolt against his ex-wife Cartimandua, queen of the Brigantes and a Roman ally. Governor Aulus Didius Gallus sends her military aid, and after some indecisive fighting a legion commanded by Caesius Nasica defeats the rebels (approximate date – some time between 52 and 57).
- Winter – Domitius Corbulo marched his legions (Legio VI Ferrata and Legio X) into the mountains of Cappadocia and made camp. He gives the men a harsh training, twenty-five-mile marches and weapons drills.
- Patriarch Onesimus succeeds Stachys the Apostle as Patriarch of Constantinople.
- Paul of Tarsus begins his third mission.
- Apollos, a later assistant of Paul, is converted to Christianity in Ephesus.
- October 13 – Claudius, Roman emperor, possibly poisoned by his wife Agrippina (b. 10 BC)
- October 31 – Stachys the Apostle, first bishop of Byzantium
- Domitia Lepida, widow of Marcus Valerius Messalla Barbatus, mother of Valeria Messalina and former mother-in-law of Claudius (b. 10 BC)
- Ban Biao, Chinese historian (b. 3)