819
| Years | 
|---|
| Millennium | 
| 1st millennium | 
| Centuries | 
| Decades | 
| Years | 
| 819 by topic | 
|---|
| Leaders | 
| Categories | 
| 
 | 
| Gregorian calendar | 819 DCCCXIX | 
| Ab urbe condita | 1572 | 
| Armenian calendar | 268 ԹՎ ՄԿԸ | 
| Assyrian calendar | 5569 | 
| Balinese saka calendar | 740–741 | 
| Bengali calendar | 225–226 | 
| Berber calendar | 1769 | 
| Buddhist calendar | 1363 | 
| Burmese calendar | 181 | 
| Byzantine calendar | 6327–6328 | 
| Chinese calendar | 戊戌年 (Earth Dog) 3516 or 3309 — to — 己亥年 (Earth Pig) 3517 or 3310 | 
| Coptic calendar | 535–536 | 
| Discordian calendar | 1985 | 
| Ethiopian calendar | 811–812 | 
| Hebrew calendar | 4579–4580 | 
| Hindu calendars | |
| - Vikram Samvat | 875–876 | 
| - Shaka Samvat | 740–741 | 
| - Kali Yuga | 3919–3920 | 
| Holocene calendar | 10819 | 
| Iranian calendar | 197–198 | 
| Islamic calendar | 203–204 | 
| Japanese calendar | Kōnin 10 (弘仁10年) | 
| Javanese calendar | 715–716 | 
| Julian calendar | 819 DCCCXIX | 
| Korean calendar | 3152 | 
| Minguo calendar | 1093 before ROC 民前1093年 | 
| Nanakshahi calendar | −649 | 
| Seleucid era | 1130/1131 AG | 
| Thai solar calendar | 1361–1362 | 
| Tibetan calendar | 阳土狗年 (male Earth-Dog) 945 or 564 or −208 — to — 阴土猪年 (female Earth-Pig) 946 or 565 or −207 | 
Year 819 (DCCCXIX) was a common year starting on Saturday of the Julian calendar.