1109
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1109 by topic | 
|---|
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1109 in poetry | 
| Gregorian calendar | 1109 MCIX | 
| Ab urbe condita | 1862 | 
| Armenian calendar | 558 ԹՎ ՇԾԸ | 
| Assyrian calendar | 5859 | 
| Balinese saka calendar | 1030–1031 | 
| Bengali calendar | 515–516 | 
| Berber calendar | 2059 | 
| English Regnal year | 9 Hen. 1 – 10 Hen. 1 | 
| Buddhist calendar | 1653 | 
| Burmese calendar | 471 | 
| Byzantine calendar | 6617–6618 | 
| Chinese calendar | 戊子年 (Earth Rat) 3806 or 3599 — to — 己丑年 (Earth Ox) 3807 or 3600 | 
| Coptic calendar | 825–826 | 
| Discordian calendar | 2275 | 
| Ethiopian calendar | 1101–1102 | 
| Hebrew calendar | 4869–4870 | 
| Hindu calendars | |
| - Vikram Samvat | 1165–1166 | 
| - Shaka Samvat | 1030–1031 | 
| - Kali Yuga | 4209–4210 | 
| Holocene calendar | 11109 | 
| Igbo calendar | 109–110 | 
| Iranian calendar | 487–488 | 
| Islamic calendar | 502–503 | 
| Japanese calendar | Tennin 2 (天仁2年) | 
| Javanese calendar | 1014–1015 | 
| Julian calendar | 1109 MCIX | 
| Korean calendar | 3442 | 
| Minguo calendar | 803 before ROC 民前803年 | 
| Nanakshahi calendar | −359 | 
| Seleucid era | 1420/1421 AG | 
| Thai solar calendar | 1651–1652 | 
| Tibetan calendar | 阳土鼠年 (male Earth-Rat) 1235 or 854 or 82 — to — 阴土牛年 (female Earth-Ox) 1236 or 855 or 83 | 
Year 1109 (MCIX) was a common year starting on Friday of the Julian calendar.