|Millennium:||1st millennium BC|
|Centuries:||5th century BC – 4th century BC – 3rd century BC|
|Decades:||370s BC 360s BC 350s BC – 340s BC – 330s BC 320s BC 310s BC|
|Years:||351 BC 350 BC 349 BC – 348 BC – 347 BC 346 BC 345 BC|
|348 BC by topic|
|Gregorian calendar||348 BC|
|Ab urbe condita||406|
|Bahá'í calendar||−2191 – −2190|
|English Regnal year||N/A|
|Chinese calendar||壬申年 (Water Monkey)
2349 or 2289
— to —
癸酉年 (Water Rooster)
2350 or 2290
|Coptic calendar||−631 – −630|
|Ethiopian calendar||−355 – −354|
|- Vikram Samvat||−291 – −290|
|- Shaka Samvat||N/A|
|- Kali Yuga||2754–2755|
|Igbo calendar||−1347 – −1346|
|Iranian calendar||969 BP – 968 BP|
|Islamic calendar||999 BH – 998 BH|
|Minguo calendar||2259 before ROC
|Thai solar calendar||196|
|Wikimedia Commons has media related to 348 BC.|
Year 348 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Corvus and Laenas (or, less frequently, year 406 Ab urbe condita). The denomination 348 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.
- After being besieged by the Persian forces of King Artaxerxes III, Sidon is taken and its population is punished with great cruelty.
- The Athenian help to its cities in Macedonia is diverted by a revolt in Euboea which Philip II of Macedon has fomented. He conquers the city of Olynthus in the Chalcidice and he annexes Chalcidice to Macedonia.
- The city of Eretria on the island of Euboea successfully rebels against the rule of Athens and Euboea is declared independent. The Athenian statesman and general, Phocion's tactical skills save an Athenian force sent to fight the supporters of Philip II on Euboea.
- Rome and Carthage make a trade agreement under which Carthage will not attack those Latin states which are faithful to Rome. This agreement demonstrates that Rome is now the dominant power in the Latin League.