Back 320 v.C. Afrikaans 320 ق م Arabic 320 ق م ARZ 320 e.C. AST E.ə. 320 Azerbaijani 320 да н.э. Byelorussian 320 да н. э. BE-X-OLD 320 г. пр.н.е. Bulgarian 320. p. n. e. BS 320 aC Catalan
| Millennium: | 1st millennium BC |
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| Centuries: | |
| Decades: | |
| Years: |
| 320 BC by topic |
| Politics |
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| Categories |
| Gregorian calendar | 320 BC CCCXX BC |
| Ab urbe condita | 434 |
| Ancient Egypt era | XXXIII dynasty, 4 |
| - Pharaoh | Ptolemy I Soter, 4 |
| Ancient Greek era | 115th Olympiad (victor)¹ |
| Assyrian calendar | 4431 |
| Balinese saka calendar | N/A |
| Bengali calendar | −912 |
| Berber calendar | 631 |
| Buddhist calendar | 225 |
| Burmese calendar | −957 |
| Byzantine calendar | 5189–5190 |
| Chinese calendar | 庚子年 (Metal Rat) 2378 or 2171 — to — 辛丑年 (Metal Ox) 2379 or 2172 |
| Coptic calendar | −603 – −602 |
| Discordian calendar | 847 |
| Ethiopian calendar | −327 – −326 |
| Hebrew calendar | 3441–3442 |
| Hindu calendars | |
| - Vikram Samvat | −263 – −262 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2781–2782 |
| Holocene calendar | 9681 |
| Iranian calendar | 941 BP – 940 BP |
| Islamic calendar | 970 BH – 969 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 2014 |
| Minguo calendar | 2231 before ROC 民前2231年 |
| Nanakshahi calendar | −1787 |
| Thai solar calendar | 223–224 |
| Tibetan calendar | 阳金鼠年 (male Iron-Rat) −193 or −574 or −1346 — to — 阴金牛年 (female Iron-Ox) −192 or −573 or −1345 |
Year 320 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Cursor and Philo (or, less frequently, year 434 Ab urbe condita). The denomination 320 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.