|Millennium:||1st millennium BC|
|Centuries:||7th century BC – 6th century BC – 5th century BC|
|Decades:||530s BC 520s BC 510s BC – 500s BC – 490s BC 480s BC 470s BC|
|Years:||505 BC 504 BC 503 BC – 502 BC – 501 BC 500 BC 499 BC|
|502 BC by topic|
|Gregorian calendar||502 BC|
|Ab urbe condita||252|
|Ancient Egypt era||XXVII dynasty, 24|
|- Pharaoh||Darius I of Persia, 20|
|Ancient Greek era||69th Olympiad, year 3|
|Chinese calendar||戊戌年 (Earth Dog)
2195 or 2135
— to —
己亥年 (Earth Pig)
2196 or 2136
|Coptic calendar||−785 – −784|
|Ethiopian calendar||−509 – −508|
|- Vikram Samvat||−445 – −444|
|- Shaka Samvat||N/A|
|- Kali Yuga||2600–2601|
|Iranian calendar||1123 BP – 1122 BP|
|Islamic calendar||1158 BH – 1156 BH|
|Minguo calendar||2413 before ROC
|Thai solar calendar||41–42|
|Wikimedia Commons has media related to 502 BC.|
The year 502 BC was a year of the pre-Julian Roman calendar. In the Roman Empire it was known as the Year of the Consulship of Tricostus and Viscellinus (or, less frequently, year 252 Ab urbe condita). The denomination 502 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.
- The island of Naxos rebels against the Persian Empire.
- Rome suppresses the Pometian revolt.
- December 4—A solar eclipse darkens Egypt. (computed, no clear historical record of observation).
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