|Centuries:||1st century BC – 1st century – 2nd century|
|Decades:||60s 70s 80s – 90s – 100s 110s 120s|
|Years:||95 96 97 – 98 – 99 100 101|
|98 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||851|
|English Regnal year||N/A|
— to —戊戌年十一月二十日
|- Vikram Samvat||154–155|
|- Shaka Samvat||20–21|
|- Kali Yuga||3199–3200|
|- Ǹrí Ìgbò||-902–-901|
|Iranian calendar||524 BP – 523 BP|
|Islamic calendar||540 BH – 539 BH|
|Juche calendar||N/A (before 1912)|
|Julian calendar||98 XCVIII|
|Minguo calendar||1814 before ROC
|Thai solar calendar||641|
|Wikimedia Commons has media related to: 98|
Year 98 (XCVIII) 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 Augustus and Traianus (or, less frequently, year 851 Ab urbe condita). The denomination 98 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 
- Emperor Nerva suffers a stroke during a private audience. Shortly after he dies of a fever at his villa in the Gardens of Sallust.
- January 27 – Nerva is succeeded by his adopted son Trajan.
- Trajan is the first Roman Emperor born in Italica, near Seville. A brilliant soldier and administrator, he enters Rome without ceremony and wins over the public. Continuing the policies of Augustus, Vespasian and Nerva, he restores the Senate to its full status in the government. He has a specific vision of the Empire, and keeps a close watch on finances. Taxes, without any increase, are sufficient during his reign to pay the considerable costs of the budget.
- The informers used by Domitian to support his tyranny are expelled from Rome.
- In order to maintain the Port of Alexandria, Trajan reopens the canal between the Nile and the Red Sea.
- Carrying out an idea of Nerva's, Trajan begins a form of state welfare aimed at assuring that poor children are fed and taken care of.
By topic 
Arts and sciences 
- The silver content of the Roman denarius rises to 93 percent under emperor Trajan, up from 92 percent under Domitian.
- January 27 – Nerva, Roman emperor (b. 30 AD)
- Apollonius of Tyana, Greek/Roman philosopher and mathematician (b. 2)