|Millennium:||1st millennium BC|
|Centuries:||5th century BC – 4th century BC – 3rd century BC|
|Decades:||400s BC 390s BC 380s BC – 370s BC – 360s BC 350s BC 340s BC|
|Years:||377 BC 376 BC 375 BC – 374 BC – 373 BC 372 BC 371 BC|
|374 BC by topic|
|Gregorian calendar||374 BC|
|Ab urbe condita||380|
|Bahá'í calendar||−2217 – −2216|
|English Regnal year||N/A|
|Chinese calendar||丙午年 (Fire Horse)
2323 or 2263
— to —
丁未年 (Fire Goat)
2324 or 2264
|Coptic calendar||−657 – −656|
|Ethiopian calendar||−381 – −380|
|- Vikram Samvat||−317 – −316|
|- Shaka Samvat||N/A|
|- Kali Yuga||2728–2729|
|Igbo calendar||−1373 – −1372|
|Iranian calendar||995 BP – 994 BP|
|Islamic calendar||1026 BH – 1025 BH|
|Minguo calendar||2285 before ROC
|Thai solar calendar||170|
|Wikimedia Commons has media related to 374 BC.|
Year 374 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Second year without Tribunate or Consulship (or, less frequently, year 380 Ab urbe condita). The denomination 374 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.
- Athens tries to retire from the Theban-Spartan war and makes peace with Sparta. However, the peace is quickly broken.
- Sparta attacks Corcyra, enlisting Syracusan help. Athens comes to the island's aid. The Athenian general, Timotheus, captures Corcyra and defeats the Spartans at sea off Alyzia (Acarnania).
- The King of Salamis, Evagoras, is assassinated. He is succeeded by his son, Nicocles, who continues his father's liberal Hellenising policy in Cyprus, encouraged by Isocrates, who writes his Exhortation to Nicocles.