850
| Years | 
|---|
| Millennium | 
| 1st millennium | 
| Centuries | 
| Decades | 
| Years | 
| 850 by topic | 
|---|
| Leaders | 
| Categories | 
| 
 | 
| Gregorian calendar | 850 DCCCL | 
| Ab urbe condita | 1603 | 
| Armenian calendar | 299 ԹՎ ՄՂԹ | 
| Assyrian calendar | 5600 | 
| Balinese saka calendar | 771–772 | 
| Bengali calendar | 256–257 | 
| Berber calendar | 1800 | 
| Buddhist calendar | 1394 | 
| Burmese calendar | 212 | 
| Byzantine calendar | 6358–6359 | 
| Chinese calendar | 己巳年 (Earth Snake) 3547 or 3340 — to — 庚午年 (Metal Horse) 3548 or 3341 | 
| Coptic calendar | 566–567 | 
| Discordian calendar | 2016 | 
| Ethiopian calendar | 842–843 | 
| Hebrew calendar | 4610–4611 | 
| Hindu calendars | |
| - Vikram Samvat | 906–907 | 
| - Shaka Samvat | 771–772 | 
| - Kali Yuga | 3950–3951 | 
| Holocene calendar | 10850 | 
| Iranian calendar | 228–229 | 
| Islamic calendar | 235–236 | 
| Japanese calendar | Kashō 3 (嘉祥3年) | 
| Javanese calendar | 747–748 | 
| Julian calendar | 850 DCCCL | 
| Korean calendar | 3183 | 
| Minguo calendar | 1062 before ROC 民前1062年 | 
| Nanakshahi calendar | −618 | 
| Seleucid era | 1161/1162 AG | 
| Thai solar calendar | 1392–1393 | 
| Tibetan calendar | 阴土蛇年 (female Earth-Snake) 976 or 595 or −177 — to — 阳金马年 (male Iron-Horse) 977 or 596 or −176 | 
Year 850 (DCCCL) was a common year starting on Wednesday of the Julian calendar.