825
| Years | 
|---|
| Millennium | 
| 1st millennium | 
| Centuries | 
| Decades | 
| Years | 
| 825 by topic | 
|---|
| Leaders | 
| Categories | 
| 
 | 
| Gregorian calendar | 825 DCCCXXV | 
| Ab urbe condita | 1578 | 
| Armenian calendar | 274 ԹՎ ՄՀԴ | 
| Assyrian calendar | 5575 | 
| Balinese saka calendar | 746–747 | 
| Bengali calendar | 231–232 | 
| Berber calendar | 1775 | 
| Buddhist calendar | 1369 | 
| Burmese calendar | 187 | 
| Byzantine calendar | 6333–6334 | 
| Chinese calendar | 甲辰年 (Wood Dragon) 3522 or 3315 — to — 乙巳年 (Wood Snake) 3523 or 3316 | 
| Coptic calendar | 541–542 | 
| Discordian calendar | 1991 | 
| Ethiopian calendar | 817–818 | 
| Hebrew calendar | 4585–4586 | 
| Hindu calendars | |
| - Vikram Samvat | 881–882 | 
| - Shaka Samvat | 746–747 | 
| - Kali Yuga | 3925–3926 | 
| Holocene calendar | 10825 | 
| Iranian calendar | 203–204 | 
| Islamic calendar | 209–210 | 
| Japanese calendar | Tenchō 2 (天長2年) | 
| Javanese calendar | 721–722 | 
| Julian calendar | 825 DCCCXXV | 
| Korean calendar | 3158 | 
| Minguo calendar | 1087 before ROC 民前1087年 | 
| Nanakshahi calendar | −643 | 
| Seleucid era | 1136/1137 AG | 
| Thai solar calendar | 1367–1368 | 
| Tibetan calendar | 阳木龙年 (male Wood-Dragon) 951 or 570 or −202 — to — 阴木蛇年 (female Wood-Snake) 952 or 571 or −201 | 
Year 825 (DCCCXXV) was a common year starting on Sunday of the Julian calendar.