|Centuries:||1st century – 2nd century – 3rd century|
|Decades:||80s 90s 100s – 110s – 120s 130s 140s|
|Years:||112 113 114 – 115 – 116 117 118|
|115 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||868|
|Chinese calendar||甲寅年 (Wood Tiger)
2811 or 2751
— to —
乙卯年 (Wood Rabbit)
2812 or 2752
|Coptic calendar||−169 – −168|
|- Vikram Samvat||171–172|
|- Shaka Samvat||37–38|
|- Kali Yuga||3216–3217|
|Iranian calendar||507 BP – 506 BP|
|Islamic calendar||523 BH – 522 BH|
|Minguo calendar||1797 before ROC
|Seleucid era||426/427 AG|
|Thai solar calendar||657–658|
Year 115 (CXV) 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 Messalla and Vergilianus (or, less frequently, year 868 Ab urbe condita). The denomination 115 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.
- Emperor Trajan is cut off in southern Mesopotamia after his invasion of that region.
- Trajan captures the Parthian capital of Ctesiphon.
- Jews in Egypt and Cyrene ignite a revolt (Kitos War) against the rule of the Roman Empire, which spreads to Cyprus, Judea, and the Roman province of Mesopotamia.
- Alexandria in Egypt is destroyed during the Jewish-Greek civil wars. Marcus Rutilius Lupus, the Roman governor, sends Legio XXII Deiotariana to protect the inhabitants of Memphis.
- A revolt breaks out in Britain; the garrison at Eboracum (York) is massacred.
- The Pantheon of Agrippa is reconstructed in Rome.
- Lusius Quietus, Trajan's governor of Judea, begins a brutal campaign to maintain the peace in the region.
- An earthquake destroys Apamea and Antioch in Syria. The local bishop is held responsible (he will be martyred and remembered as St. Ignatius).
- Pausanias, Greek historian and geographer (d. 180)
- Emperor Shun of Han, Emperor of the Chinese Han Dynasty (d. 144)