|Millennium:||1st millennium BC|
|Centuries:||3rd century BC – 2nd century BC – 1st century BC|
|Decades:||220s BC 210s BC 200s BC – 190s BC – 180s BC 170s BC 160s BC|
|Years:||202 BC 201 BC 200 BC – 199 BC – 198 BC 197 BC 196 BC|
|199 BC by topic|
|Gregorian calendar||199 BC|
|Ab urbe condita||555|
|Ancient Egypt era||XXXIII dynasty, 125|
|- Pharaoh||Ptolemy V Epiphanes, 5|
|Ancient Greek era||145th Olympiad, year 2|
|Chinese calendar||辛丑年 (Metal Ox)
2498 or 2438
— to —
壬寅年 (Water Tiger)
2499 or 2439
|Coptic calendar||−482 – −481|
|Ethiopian calendar||−206 – −205|
|- Vikram Samvat||−142 – −141|
|- Shaka Samvat||N/A|
|- Kali Yuga||2903–2904|
|Iranian calendar||820 BP – 819 BP|
|Islamic calendar||845 BH – 844 BH|
|Minguo calendar||2110 before ROC
|Seleucid era||113/114 AG|
|Thai solar calendar||344–345|
|Wikimedia Commons has media related to 199 BC.|
Year 199 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Lentulus and Tappulus (or, less frequently, year 555 Ab urbe condita). The denomination 199 BC 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.
- The Roman general Gnaeus Baebius Tamphilus attacks the Insubres in Gaul, but loses over 6,700 soldiers in the process.
- Scipio Africanus becomes censor and princeps Senatus (the titular head of the Roman Senate).
- The Roman law, Lex Porcia, is proposed by the tribune P. Porcius Laeca to give Roman citizens in Italy and provinces the right of appeal in capital cases.