|Centuries:||5th century – 6th century – 7th century|
|Decades:||470s 480s 490s – 500s – 510s 520s 530s|
|Years:||502 503 504 – 505 – 506 507 508|
|505 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||1258|
|Chinese calendar||甲申年 (Wood Monkey)
3201 or 3141
— to —
乙酉年 (Wood Rooster)
3202 or 3142
|- Vikram Samvat||561–562|
|- Shaka Samvat||427–428|
|- Kali Yuga||3606–3607|
|Iranian calendar||117 BP – 116 BP|
|Islamic calendar||121 BH – 120 BH|
|Minguo calendar||1407 before ROC
|Seleucid era||816/817 AG|
|Thai solar calendar||1047–1048|
Year 505 (DV) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodorus and Sabinianus (or, less frequently, year 1258 Ab urbe condita). The denomination 505 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.
- Emperor Anastasius I agrees to pay his share of the cost of defending the Caucasian Gates against nomadic invasions from east Asia .
- Anastasius I decides to rebuild the village of Dara (Northern Mesopotamia). He constructs a new strategic fortress to guard the frontier.
- The western Huns (Hephthalites) from the Caucasus invade the Persian Empire.
- Belisarius, Byzantine general (d. 565)
- Dorotheus of Gaza, Christian monk and abbot (approximate date)
- Dynod Bwr, king of Hen Ogledd (approximate date)
- Varāhamihira, Indian astronomer and mathematician (d. 587)