For the film, see 491 (film).
| Centuries: | 4th century · 5th century · 6th century |
| Decades: | 460s 470s 480s 490s 500s 510s 520s |
| Years: | 488 489 490 491 492 493 494 |
| 491 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 491 CDXCI |
| Ab urbe condita | 1244 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1353 – -1352 |
| Bengali calendar | -102 |
| Berber calendar | 1441 |
| Buddhist calendar | 1035 |
| Burmese calendar | -147 |
| Byzantine calendar | 5999 – 6000 |
| Chinese calendar | 庚午年十二月初六日 (3127/3187-12-6) — to —
辛未年十一月十五日(3128/3188-11-15) |
| Coptic calendar | 207 – 208 |
| Ethiopian calendar | 483 – 484 |
| Hebrew calendar | 4251 – 4252 |
| Hindu calendars | |
| - Bikram Samwat | 547 – 548 |
| - Shaka Samvat | 413 – 414 |
| - Kali Yuga | 3592 – 3593 |
| Holocene calendar | 10491 |
| Iranian calendar | 131 BP – 130 BP |
| Islamic calendar | 135 BH – 134 BH |
| Japanese calendar | |
| Korean calendar | 2824 |
| Thai solar calendar | 1034 |