Decades: 240s BC 230s BC 220s BC 210s BC 200s BC - **190s BC** - 180s BC 170s BC 160s BC 150s BC 140s BC

Years: 195 BC 194 BC 193 BC 192 BC 191 BC - **190 BC** - 189 BC 188 BC 187 BC 186 BC 185 BC

- Battle of the Eurymedon Roman forces under Lucius Aemilius Regillus defeat a Seleucid fleet commanded by Hannibal, fighting his last battle.
- Battle of Myonessus Another Seleucid fleet is defeated by the Romans
- December: Battle of Magnesia. Seleucids under Antiochus III the Great of Syria defeated by Romans under Scipio Asiaticus, his brother Scipio Africanus Major, and Gnaeus Domitius.

- Hipparchus, Greek astronomer and mathematician, in Nicaea, Bithynia (now Turkey) (+ 120 BC) (approximate date, another possible date is 194 BC).

- Dionysius Thrax, Greek scholar. (approximate date)