|Millennium:||1st millennium BC|
|230 BC by topic|
|Gregorian calendar||230 BC|
|Ab urbe condita||524|
|Ancient Egypt era||XXXIII dynasty, 94|
|- Pharaoh||Ptolemy III Euergetes, 17|
|Ancient Greek era||137th Olympiad, year 3|
|Balinese saka calendar||N/A|
|Chinese calendar||庚午年 (Metal Horse)|
2467 or 2407
— to —
辛未年 (Metal Goat)
2468 or 2408
|Coptic calendar||−513 – −512|
|Ethiopian calendar||−237 – −236|
|- Vikram Samvat||−173 – −172|
|- Shaka Samvat||N/A|
|- Kali Yuga||2871–2872|
|Iranian calendar||851 BP – 850 BP|
|Islamic calendar||877 BH – 876 BH|
|Minguo calendar||2141 before ROC|
|Seleucid era||82/83 AG|
|Thai solar calendar||313–314|
−103 or −484 or −1256
— to —
−102 or −483 or −1255
Year 230 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Barbula and Pera (or, less frequently, year 524 Ab urbe condita). The denomination 230 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 city of Pergamum is attacked by the Galatians (Celts who have settled in central Anatolia) because the leader of Pergamum, Attalus I Soter, has refused to pay them the customary tribute. Attalus crushes his enemy in a battle outside the walls of his city and to mark the success he takes the title of king and the name Soter.
- King Agron of Illyria dies. Pinnes, the son of Agron and Agron's first wife Triteuta, officially succeeds his father as king, but the kingdom is effectively ruled by Agron's second wife, Queen Teuta (Tefta), who expels the Greeks from the Illyrian coast and then launches Illyrian pirate ships into the Ionian Sea, preying on Roman shipping. She continues her husband's policy of attacking cities on the west coast of Greece and practising large-scale piracy in the Adriatic and Ionian Seas.
- With Roman merchants being killed by the Illyrian pirates, envoys are sent by Rome to Illyria. After the Roman ambassador lucius Coruncanius and the Issaean ambassador Cleemporus are murdered at sea by Illyrian soldiers after causing offence to Queen Teuta, Roman forces occupy the island of Corcyra with the aim of humbling Teuta.
- The Temple of Horus is built by King Ptolemy III.
- Titus Quinctius Flamininus, a Roman politician and general who will be instrumental in the Roman conquest of Greece (d. 174 BC)
- Adherbal, admiral of the Carthaginian fleet who has battled for domination of the Mediterranean Sea for Carthage in the First Punic War against Rome
- Agron of Illyria as aforementioned (vid. supra)
- Aristarchus of Samos, Greek astronomer and mathematician (b. c. 310 BC)