| Centuries: | 6th century BC - 5th century BC - 4th century BC |
| Decades: | 460s BC 450s BC 440s BC - 430s BC - 420s BC 410s BC 400s BC |
| Years: | 434 BC 433 BC 432 BC - 431 BC - 430 BC 429 BC 428 BC |
| 431 BC by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| Establishments - Disestablishments | |
| Gregorian calendar | 431 BC |
| Ab urbe condita | 323 |
| Armenian calendar | N/A |
| Bahá'í calendar | -2274 – -2273 |
| Berber calendar | 520 |
| Buddhist calendar | 114 |
| Burmese calendar | -1068 |
| Chinese calendar | 2206/2266 ([[Sexagenary cycle|]]年) — to —
2207/2267([[Sexagenary cycle|]]年) |
| Coptic calendar | -714 – -713 |
| Ethiopian calendar | -438 – -437 |
| Hebrew calendar | 3330 – 3331 |
| Hindu calendars | |
| - Vikram Samvat | -375 – -374 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2671 – 2672 |
| Holocene calendar | 9570 |
| Iranian calendar | 1052 BP – 1051 BP |
| Islamic calendar | 1084 BH – 1083 BH |
| Japanese calendar | |
| Korean calendar | 1903 |
| Thai solar calendar | 113 |