| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | 4th century BC – 3rd century BC – 2nd century BC |
| Decades: | 280s BC 270s BC 260s BC – 250s BC – 240s BC 230s BC 220s BC |
| Years: | 257 BC 256 BC 255 BC – 254 BC – 253 BC 252 BC 251 BC |
| 254 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 254 BC |
| Ab urbe condita | 500 |
| Armenian calendar | N/A |
| Bahá'í calendar | -2097 – -2096 |
| Bengali calendar | -846 |
| Berber calendar | 697 |
| Buddhist calendar | 291 |
| Burmese calendar | -891 |
| Byzantine calendar | 5255 – 5256 |
| Chinese calendar | [[Sexagenary cycle|]]年 (2383/2443) — to —
[[Sexagenary cycle|]]年(2384/2444) |
| Coptic calendar | -537 – -536 |
| Ethiopian calendar | -261 – -260 |
| Hebrew calendar | 3507 – 3508 |
| Hindu calendars | |
| - Bikram Samwat | -197 – -196 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2848 – 2849 |
| Holocene calendar | 9747 |
| Iranian calendar | 875 BP – 874 BP |
| Islamic calendar | 902 BH – 901 BH |
| Japanese calendar | |
| Korean calendar | 2080 |
| Thai solar calendar | 290 |