1103
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1103 by topic | 
|---|
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1103 in poetry | 
| Gregorian calendar | 1103 MCIII | 
| Ab urbe condita | 1856 | 
| Armenian calendar | 552 ԹՎ ՇԾԲ | 
| Assyrian calendar | 5853 | 
| Balinese saka calendar | 1024–1025 | 
| Bengali calendar | 509–510 | 
| Berber calendar | 2053 | 
| English Regnal year | 3 Hen. 1 – 4 Hen. 1 | 
| Buddhist calendar | 1647 | 
| Burmese calendar | 465 | 
| Byzantine calendar | 6611–6612 | 
| Chinese calendar | 壬午年 (Water Horse) 3800 or 3593 — to — 癸未年 (Water Goat) 3801 or 3594 | 
| Coptic calendar | 819–820 | 
| Discordian calendar | 2269 | 
| Ethiopian calendar | 1095–1096 | 
| Hebrew calendar | 4863–4864 | 
| Hindu calendars | |
| - Vikram Samvat | 1159–1160 | 
| - Shaka Samvat | 1024–1025 | 
| - Kali Yuga | 4203–4204 | 
| Holocene calendar | 11103 | 
| Igbo calendar | 103–104 | 
| Iranian calendar | 481–482 | 
| Islamic calendar | 496–497 | 
| Japanese calendar | Kōwa 5 (康和5年) | 
| Javanese calendar | 1008–1009 | 
| Julian calendar | 1103 MCIII | 
| Korean calendar | 3436 | 
| Minguo calendar | 809 before ROC 民前809年 | 
| Nanakshahi calendar | −365 | 
| Seleucid era | 1414/1415 AG | 
| Thai solar calendar | 1645–1646 | 
| Tibetan calendar | 阳水马年 (male Water-Horse) 1229 or 848 or 76 — to — 阴水羊年 (female Water-Goat) 1230 or 849 or 77 | 
Year 1103 (MCIII) was a common year starting on Thursday of the Julian calendar.