|Centuries:||1st century BC – 1st century – 2nd century|
|Decades:||0s 10s 20s – 30s – 40s 50s 60s|
|Years:||30 31 32 – 33 – 34 35 36|
|33 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||786|
|Chinese calendar||壬辰年 (Water Dragon)
2729 or 2669
— to —
癸巳年 (Water Snake)
2730 or 2670
|Coptic calendar||−251 – −250|
|- Vikram Samvat||89–90|
|- Shaka Samvat||N/A|
|- Kali Yuga||3134–3135|
|Iranian calendar||589 BP – 588 BP|
|Islamic calendar||607 BH – 606 BH|
|Minguo calendar||1879 before ROC
|Seleucid era||344/345 AG|
|Thai solar calendar||575–576|
Year 33 (XXXIII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known in the Roman world as the Year of the Consulship of Ocella and Sulla (or, less frequently, year 786 Ab urbe condita). The denomination 33 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.
- Servius Sulpicius Galba is a Roman Consul.
- Emperor Tiberius founds a credit bank in Rome.
- A financial crisis hits Rome, due to poorly chosen fiscal policies. Land values plummet, and credit is increased. These actions lead to a lack of cash, a crisis of confidence, and much land speculation. The primary victims are senators, knights and the wealthy. Many aristocratic families are ruined.
- Although the usurpation of Wang Mang and the Chimei Rebellion are behind him, Emperor Guangwu now faces a new threat to the Han Dynasty: the Rebellion of Gongsun Shu in the Sichuan province. Gongsun's naval forces are unsuccessful against Han General Cen Peng, so Gongsun decides to fortify his position by blockading the entire Yangtze River with a large floating pontoon bridge, complete with floating fortified posts. He erects forts on both banks of the river for further missile fire and protects his barrier with a large boom. After Cen Peng is unable to break through, he constructs several "castle ships" with high ramparts and ramming vessels known as "colliding swoopers", which break through Gongsun's lines and allow Cen to quell his rebellion. Gongsun Shu is totally defeated three years later.
- Agrippina the Elder, wife of Germanicus (suicide by starvation) (b. 14 BC)
- Drusus Caesar, son of Germanicus and Agrippina the Elder, adoptive son of Tiberius (starvation) (b. 7 AD)
- Gaius Asinius Gallus, widower of Vipsania Agrippina and alleged lover of Agrippina the elder (starvation)
- Jesus Christ of Nazareth, (possible year of crucifixion) (b. c. 7 BC-2 BC)
- Marcus Aemilius Lepidus, senator, consul in 6, father-in-law of Drusus Caesar (natural causes) (b. c. 30 BC)
- Bunson, Matthew (2002). Encyclopedia of the Roman Empire (2nd ed.). Infobase Publishing. p. 226. ISBN 978-0-8160-4562-4.
- Harris, W. V. (2011). Rome's Imperial Economy: Twelve Essays. Oxford University Press. p. 238. ISBN 978-0-19-959516-7.
- Salisbury, Joyce E. (2001). Encyclopedia of women in the ancient world. ABC-CLIO. p. 3. ISBN 978-1-57607-092-5.
- Fantham, Elaine (2006). Julia Augusti: The Emperor's Daughter. Taylor & Francis. p. 122. ISBN 978-0-415-33145-6.
- Bunson, Matthew (2002). Encyclopedia of the Roman Empire (2nd ed.). Infobase Publishing. p. 50. ISBN 978-0-8160-4562-4.
- Colin J. Humphreys and W. G. Waddington, "Dating the Crucifixion ," Nature 306 (December 22/29, 1983), pp. 743-46. 
- Hazel, John (2002). Who's who in the Roman world (2nd ed.). Routledge. p. 166. ISBN 978-0-415-29162-0.