|Millennium:||1st millennium BC|
|Centuries:||6th century BC – 5th century BC – 4th century BC|
|Decades:||430s BC 420s BC 410s BC – 400s BC – 390s BC 380s BC 370s BC|
|Years:||410 BC 409 BC 408 BC – 407 BC – 406 BC 405 BC 404 BC|
|407 BC by topic|
|Gregorian calendar||407 BC|
|Ab urbe condita||347|
|Ancient Egypt era||XXVII dynasty, 119|
|- Pharaoh||Darius II of Persia, 17|
|Ancient Greek era||93rd Olympiad, year 2|
|Chinese calendar||癸酉年 (Water Rooster)
2290 or 2230
— to —
甲戌年 (Wood Dog)
2291 or 2231
|Coptic calendar||−690 – −689|
|Ethiopian calendar||−414 – −413|
|- Vikram Samvat||−350 – −349|
|- Shaka Samvat||N/A|
|- Kali Yuga||2695–2696|
|Iranian calendar||1028 BP – 1027 BP|
|Islamic calendar||1060 BH – 1059 BH|
|Minguo calendar||2318 before ROC
|Thai solar calendar||136–137|
|Wikimedia Commons has media related to 407 BC.|
Year 407 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Medullinus, Vibulanus, Volusus and Ahala (or, less frequently, year 347 Ab urbe condita). The denomination 407 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 Athenian general Thrasybulus recaptures Abdera and Thasos.
- The Spartan admiral Lysander refuses to be lured out of Ephesus to do battle with Alcibiades. However, while Alcibiades is away seeking supplies, the Athenian squadron is placed under the command of Antiochus, his helmsman, who is routed by the Spartan fleet (with the help of the Persians under Cyrus) in the Battle of Notium (or Ephesus).
- The defeat gives the enemies of Alcibiades an excuse to strip him of his command. He never returns again to Athens. He sails north to land he owned in the Thracian Chersonese. Except for a brief appearance at Aegospotami, Alcibiades' involvement in the Peloponnesian War is over.
- The exiled former leader of the moderate democrats of Syracuse, Hermocrates, is killed while attempting to force his way back into Syracuse.