|Centuries:||1st century BC – 1st century – 2nd century|
|Decades:||10s BC 0s BC 0s – 10s – 20s 30s 40s|
|Years:||12 13 14 – 15 – 16 17 18|
|15 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||768|
|English Regnal year||N/A|
— to —乙亥年正月初二日
|- Vikram Samvat||71–72|
|- Shaka Samvat||N/A|
|- Kali Yuga||3116–3117|
|- Ǹrí Ìgbò||-985–-984|
|Iranian calendar||607 BP – 606 BP|
|Islamic calendar||626 BH – 625 BH|
|Juche calendar||N/A (before 1912)|
|Julian calendar||15 XV|
|Minguo calendar||1897 before ROC
|Thai solar calendar||558|
|Wikimedia Commons has media related to: 15|
Year 15 (XV) 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 Caesar and Flaccus (or, less frequently, year 768 Ab urbe condita). The denomination 15 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.
By place 
Roman Empire 
- Emona (currently Ljubljana) is founded by Legio XV Apollinaris.
- Germanicus fights a drawn battle with Arminius in the Teutoburg Forest.
- Germanicus captures Thusnelda, the wife of Arminius.
- Legio XXI Rapax is stationed in Regensburg.
- In Rome, the selection of civil servants passes from the people to the Emperor and the Senate.
- Valerius Gratus is appointed Prefect of Iudaea.
- The river Tiber floods parts of Rome.
By topic 
Arts and sciences 
- September 24 – Vitellius, Roman Emperor (d. 69 AD)
- November 6 – Agrippina the younger, Roman empress (or possibly 16) (d. 59)