855
| Years | 
|---|
| Millennium | 
| 1st millennium | 
| Centuries | 
| Decades | 
| Years | 
| 855 by topic | 
|---|
| Leaders | 
| Categories | 
| 
 | 
| Gregorian calendar | 855 DCCCLV | 
| Ab urbe condita | 1608 | 
| Armenian calendar | 304 ԹՎ ՅԴ | 
| Assyrian calendar | 5605 | 
| Balinese saka calendar | 776–777 | 
| Bengali calendar | 261–262 | 
| Berber calendar | 1805 | 
| Buddhist calendar | 1399 | 
| Burmese calendar | 217 | 
| Byzantine calendar | 6363–6364 | 
| Chinese calendar | 甲戌年 (Wood Dog) 3552 or 3345 — to — 乙亥年 (Wood Pig) 3553 or 3346 | 
| Coptic calendar | 571–572 | 
| Discordian calendar | 2021 | 
| Ethiopian calendar | 847–848 | 
| Hebrew calendar | 4615–4616 | 
| Hindu calendars | |
| - Vikram Samvat | 911–912 | 
| - Shaka Samvat | 776–777 | 
| - Kali Yuga | 3955–3956 | 
| Holocene calendar | 10855 | 
| Iranian calendar | 233–234 | 
| Islamic calendar | 240–241 | 
| Japanese calendar | Saikō 2 (斉衡2年) | 
| Javanese calendar | 752–753 | 
| Julian calendar | 855 DCCCLV | 
| Korean calendar | 3188 | 
| Minguo calendar | 1057 before ROC 民前1057年 | 
| Nanakshahi calendar | −613 | 
| Seleucid era | 1166/1167 AG | 
| Thai solar calendar | 1397–1398 | 
| Tibetan calendar | 阳木狗年 (male Wood-Dog) 981 or 600 or −172 — to — 阴木猪年 (female Wood-Pig) 982 or 601 or −171 | 
Year 855 (DCCCLV) was a common year starting on Tuesday of the Julian calendar.