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|Centuries:||1st century – 2nd century – 3rd century|
|Decades:||170s 180s 190s – 200s – 210s 220s 230s|
|Years:||197 198 199 – 200 – 201 202 203|
|200 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||953|
|Chinese calendar||己卯年 (Earth Rabbit)
2896 or 2836
— to —
庚辰年 (Metal Dragon)
2897 or 2837
|Coptic calendar||−84 – −83|
|- Vikram Samvat||256–257|
|- Shaka Samvat||122–123|
|- Kali Yuga||3301–3302|
|Iranian calendar||422 BP – 421 BP|
|Islamic calendar||435 BH – 434 BH|
|Minguo calendar||1712 before ROC
|Seleucid era||511/512 AG|
|Thai solar calendar||742–743|
Year 200 (CC) was a leap 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 Severus and Victorinus (or, less frequently, year 953 Ab urbe condita). The denomination 200 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.
- Human population reaches about 257 million.
- Emperor Septimius Severus visits the Syria, Palestine, and Arabia.
- Palestine, benefiting from the benevolent policies of Severus, sees a significant economic revival.
- The province of Numidia is taken from the African proconsul and made an Imperial province.
- Chinese warlord Cao Cao defeats Yuan Shao in the Battle of Guandu.
- In Japan, Himiko, whose capital is situated in Yamatai, extends her authority over a number of clans.
- The Classic Age of Maya civilization begins (around this year).
- The Paracas culture in the Andes comes to an end (around this year).
- The Severan Tondo, depicting Septimius Severus, Julia Domna and their children Geta and Caracalla, from Fayum, Egypt, is made. It is now kept at Staatliche Museen zu Berlin, Preussischer Kulturbesitz, Antikensammlung.
- Jewish Eretz Yisraeli scholar Judah ha-Nasi compiles tracts of the Mishnah, beginning the creation of Talmudic law.
- Clement of Alexandria denounces the use of musical instruments to support human voices in Christian music.
- Brahmanism evolves into Hinduism (approximate date).
- Fei Yi, an official of Shu Han (approximate date) (d. 253)
- Ma Jun (d. 265)
- Wang Ling, general of Wei (d. 251)
- Zhou Fang, general of Wu (d. 240)
- Diophantus, Greek mathematician
- Marcus Claudius Tacitus, Roman Emperor (d. 276)
- Valerian I, Roman Emperor (d. 260/264
- May 5 – Sun Ce, elder brother of the founder of the Wu Kingdom, Sun Quan (b. 175)
- Chunyu Qiong (executed by Yuan Shao)
- Dong Cheng (executed by Cao Cao)
- Gan Ji, Taoist priest (executed by Sun Ce)
- Han Juzi, general under Yuan Shao
- Ji Ping (executed by Cao Cao)
- Ju Shou, officer of Yuan Shao
- Lü Weihuang
- Sui Gu
- Sui Yuanjin
- Tian Feng (executed by Yuan Shao)
- Wen Chou, general under Yuan Shao
- Xu Gong, governor (executed by Sun Ce)
- Yan Liang, general under Yuan Shao
- Zheng Xuan, Chinese scholar (b. 127)