|Millennium:||1st millennium BC|
|Centuries:||4th century BC – 3rd century BC – 2nd century BC|
|Decades:||250s BC 240s BC 230s BC – 220s BC – 210s BC 200s BC 190s BC|
|Years:||232 BC 231 BC 230 BC – 229 BC – 228 BC 227 BC 226 BC|
|229 BC by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Gregorian calendar||229 BC|
|Ab urbe condita||525|
|Bahá'í calendar||−2072 – −2071|
|English Regnal year||N/A|
|Chinese calendar||辛未年 (Metal Goat)
2468 or 2408
— to —
壬申年 (Water Monkey)
2469 or 2409
|Coptic calendar||−512 – −511|
|Ethiopian calendar||−236 – −235|
|- Vikram Samvat||−172 – −171|
|- Shaka Samvat||N/A|
|- Kali Yuga||2873–2874|
|Igbo calendar||−1228 – −1227|
|Iranian calendar||850 BP – 849 BP|
|Islamic calendar||876 BH – 875 BH|
|Minguo calendar||2140 before ROC
|Thai solar calendar||315|
|Wikimedia Commons has media related to 229 BC.|
Year 229 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Albinus and Centumalus (or, less frequently, year 525 Ab urbe condita). The denomination 229 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 First Illyrian War starts when the Roman Senate dispatches an army under the command of the consuls Lucius Postumius Albinus and Gnaeus Fulvius Centumalus to Illyria. Rome forces the withdrawal of Illyrian garrisons in the Greek cities of Epidamnus, Apollonia, Corcyra and Pharos and establishes a protectorate over these Greek towns.
- The Illyrian tribe of the Ardiaei is subdued by the Romans.
- The King of Macedonia, Demetrius II, dies. His nephew, Antigonus III comes to the Macedonian throne as regent for his half-cousin and the future king Philip V, who is only ten years old.
- Concerned at Rome's expansion, Antigonus III pursues a policy of befriending the Illyrians, even though the Greeks in the region support Rome in quelling the Illyrian pirates.
- The involvement of Rome in Illyria leads to the establishment of friendly relations between Rome and the enemies of Macedonia: the Aetolian League and Achaean League, which approve the suppression of Illyrian piracy.
- Aratus of Sicyon brings Argos into the Achaean League and then helps liberate Athens. This brings Aratus into conflict with Sparta.
- Lucius Aemilius Paullus Macedonicus, Roman general, consul and politician (d. 160 BC)
- Qin Er Shi, Emperor of Qin China (d. 207 BC)