1129
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1129 by topic | 
|---|
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1129 in poetry | 
| Gregorian calendar | 1129 MCXXIX | 
| Ab urbe condita | 1882 | 
| Armenian calendar | 578 ԹՎ ՇՀԸ | 
| Assyrian calendar | 5879 | 
| Balinese saka calendar | 1050–1051 | 
| Bengali calendar | 535–536 | 
| Berber calendar | 2079 | 
| English Regnal year | 29 Hen. 1 – 30 Hen. 1 | 
| Buddhist calendar | 1673 | 
| Burmese calendar | 491 | 
| Byzantine calendar | 6637–6638 | 
| Chinese calendar | 戊申年 (Earth Monkey) 3826 or 3619 — to — 己酉年 (Earth Rooster) 3827 or 3620 | 
| Coptic calendar | 845–846 | 
| Discordian calendar | 2295 | 
| Ethiopian calendar | 1121–1122 | 
| Hebrew calendar | 4889–4890 | 
| Hindu calendars | |
| - Vikram Samvat | 1185–1186 | 
| - Shaka Samvat | 1050–1051 | 
| - Kali Yuga | 4229–4230 | 
| Holocene calendar | 11129 | 
| Igbo calendar | 129–130 | 
| Iranian calendar | 507–508 | 
| Islamic calendar | 523–524 | 
| Japanese calendar | Daiji 4 (大治4年) | 
| Javanese calendar | 1034–1035 | 
| Julian calendar | 1129 MCXXIX | 
| Korean calendar | 3462 | 
| Minguo calendar | 783 before ROC 民前783年 | 
| Nanakshahi calendar | −339 | 
| Seleucid era | 1440/1441 AG | 
| Thai solar calendar | 1671–1672 | 
| Tibetan calendar | 阳土猴年 (male Earth-Monkey) 1255 or 874 or 102 — to — 阴土鸡年 (female Earth-Rooster) 1256 or 875 or 103 | 
Year 1129 (MCXXIX) was a common year starting on Tuesday of the Julian calendar.