| 439 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 439 BC |
| Ab urbe condita | 315 |
| Armenian calendar | N/A |
| Assyrian calendar | 4312 |
| Bahá'í calendar | -2282–-2281 |
| Bengali calendar | -1031 |
| Berber calendar | 512 |
| English Regnal year | N/A |
| Buddhist calendar | 106 |
| Burmese calendar | -1076 |
| Byzantine calendar | 5070–5071 |
| Chinese calendar | 辛丑年 (2198/2258) — to —
壬寅年(2199/2259) |
| Coptic calendar | -722–-721 |
| Ethiopian calendar | -446–-445 |
| Hebrew calendar | 3322–3323 |
| Hindu calendars | |
| - Vikram Samvat | -382–-381 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2663–2664 |
| Holocene calendar | 9562 |
| Iranian calendar | 1060 BP – 1059 BP |
| Islamic calendar | 1093 BH – 1092 BH |
| Japanese calendar | |
| Korean calendar | 1895 |
| Minguo calendar | 2350 before ROC 民前2350年 |
| Thai solar calendar | 105 |
Year 439 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Lanatus and Barbatus (or, less frequently, year 315 Ab urbe condita). The denomination 439 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.