| Millennium: | 1st millennium |
|---|---|
| Centuries: | 2nd century – 3rd century – 4th century |
| Decades: | 230s 240s 250s – 260s – 270s 280s 290s |
| Years: | 258 259 260 – 261 – 262 263 264 |
| 261 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 261 CCLXI |
| Ab urbe condita | 1014 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1583 – -1582 |
| Bengali calendar | -332 |
| Berber calendar | 1211 |
| Buddhist calendar | 805 |
| Burmese calendar | -377 |
| Byzantine calendar | 5769 – 5770 |
| Chinese calendar | 庚辰年十一月十三日 (2897/2957-11-13) — to —
辛巳年十一月廿三日(2898/2958-11-23) |
| Coptic calendar | -23 – -22 |
| Ethiopian calendar | 253 – 254 |
| Hebrew calendar | 4021 – 4022 |
| Hindu calendars | |
| - Bikram Samwat | 317 – 318 |
| - Shaka Samvat | 183 – 184 |
| - Kali Yuga | 3362 – 3363 |
| Holocene calendar | 10261 |
| Iranian calendar | 361 BP – 360 BP |
| Islamic calendar | 372 BH – 371 BH |
| Japanese calendar | |
| Korean calendar | 2594 |
| Thai solar calendar | 804 |