Year 496 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Albus and Tricostus (or, less frequently, year 258 Ab urbe condita). The denomination 496 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.
| Millennium: | 1st millennium BC |
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| Gregorian calendar | 496 BC CDXCVI BC |
| Ab urbe condita | 258 |
| Ancient Egypt era | XXVII dynasty, 30 |
| - Pharaoh | Darius I of Persia, 26 |
| Ancient Greek era | 71st Olympiad (victor)¹ |
| Assyrian calendar | 4255 |
| Balinese saka calendar | N/A |
| Bengali calendar | −1088 |
| Berber calendar | 455 |
| Buddhist calendar | 49 |
| Burmese calendar | −1133 |
| Byzantine calendar | 5013–5014 |
| Chinese calendar | 甲辰年 (Wood Dragon) 2202 or 1995 — to — 乙巳年 (Wood Snake) 2203 or 1996 |
| Coptic calendar | −779 – −778 |
| Discordian calendar | 671 |
| Ethiopian calendar | −503 – −502 |
| Hebrew calendar | 3265–3266 |
| Hindu calendars | |
| - Vikram Samvat | −439 – −438 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2605–2606 |
| Holocene calendar | 9505 |
| Iranian calendar | 1117 BP – 1116 BP |
| Islamic calendar | 1151 BH – 1150 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 1838 |
| Minguo calendar | 2407 before ROC 民前2407年 |
| Nanakshahi calendar | −1963 |
| Thai solar calendar | 47–48 |
| Tibetan calendar | 阳木龙年 (male Wood-Dragon) −369 or −750 or −1522 — to — 阴木蛇年 (female Wood-Snake) −368 or −749 or −1521 |