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Year 165 (CLXV) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Orfitus and Pudens (or, less frequently, year 918 Ab urbe condita). The denomination 165 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.
|Ab urbe condita||918|
|Balinese saka calendar||86–87|
|Chinese calendar||甲辰年 (Wood Dragon)|
2861 or 2801
— to —
乙巳年 (Wood Snake)
2862 or 2802
|Coptic calendar||−119 – −118|
|- Vikram Samvat||221–222|
|- Shaka Samvat||86–87|
|- Kali Yuga||3265–3266|
|Iranian calendar||457 BP – 456 BP|
|Islamic calendar||471 BH – 470 BH|
|Minguo calendar||1747 before ROC|
|Seleucid era||476/477 AG|
|Thai solar calendar||707–708|
291 or −90 or −862
— to —
292 or −89 or −861
- A Roman military expedition under Avidius Cassius is successful against Parthia, capturing Artaxata, Seleucia on the Tigris, and Ctesiphon. The Parthians sue for peace.
- Antonine Plague: A pandemic breaks out in Rome, after the Roman army returns from Parthia. The plague significantly depopulates the Roman Empire and China.
- Legio II Italica is levied by Emperor Marcus Aurelius.
- Dura-Europos is taken by the Romans.
- The Romans establish a garrison at Doura Europos on the Euphrates, a control point for the commercial route to the Persian Gulf.
- Avidius Cassius takes Nisibis, and conquers the north of Mesopotamia.
- Marcus Aurelius creates 4 legal districts (iuridici) in Italy (5 if Rome is included).
- Appian, Greek historian and writer (approximate date)
- Chadea, Korean ruler of Goguryeo (b. AD 71)
- Claudius Ptolemaeus, Greek astronomer (approximate date)
- Deng Mengnü (or Bo Mengnü), Chinese empress
- Elpinice, daughter of Herodes Atticus (b. AD 142)
- Justin Martyr, Christian apologist (b. AD 100)
- Peregrinus Proteus, Greek philosopher (b. AD 95)
- Taejodae, Korean ruler of Goguryeo (b. AD 47)
- "List of Rulers of Korea". www.metmuseum.org. Retrieved April 18, 2019.