|Centuries:||1st century BC – 1st century – 2nd century|
|Decades:||50s 60s 70s – 80s – 90s 100s 110s|
|Years:||83 84 85 – 86 – 87 88 89|
|86 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||839|
|Bahá'í calendar||−1758 – −1757|
|English Regnal year||N/A|
|Chinese calendar||乙酉年 (Wood Rooster)
2782 or 2722
— to —
丙戌年 (Fire Dog)
2783 or 2723
|Coptic calendar||−198 – −197|
|- Vikram Samvat||142–143|
|- Shaka Samvat||8–9|
|- Kali Yuga||3187–3188|
|Igbo calendar||−914 – −913|
|Iranian calendar||536 BP – 535 BP|
|Islamic calendar||552 BH – 551 BH|
|Minguo calendar||1826 before ROC
|Thai solar calendar||629|
|Wikimedia Commons has media related to 86.|
Year 86 (LXXXVI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Petronianus (la) (or, less frequently, year 839 Ab urbe condita). The denomination 86 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 Domitian introduces the Capitoline Games.
- The Roman General Trajan, future emperor, begins a campaign to crush an uprising in Germany.
- Germany is divided into two provinces, Upper Germany and Lower Germany.
- Roman legions face disaster in Dacia in the First Battle of Tapae, when Cornelius Fuscus, Praetorian prefect, launches a powerful offensive that becomes a failure. Encircled in the valley of Timi, he dies along with his entire army. Rome must pay tribute to the Dacians in exchange for a vague recognition of Rome's importance.