1148
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1148 by topic | 
|---|
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1148 in poetry | 
| Gregorian calendar | 1148 MCXLVIII | 
| Ab urbe condita | 1901 | 
| Armenian calendar | 597 ԹՎ ՇՂԷ | 
| Assyrian calendar | 5898 | 
| Balinese saka calendar | 1069–1070 | 
| Bengali calendar | 554–555 | 
| Berber calendar | 2098 | 
| English Regnal year | 13 Ste. 1 – 14 Ste. 1 | 
| Buddhist calendar | 1692 | 
| Burmese calendar | 510 | 
| Byzantine calendar | 6656–6657 | 
| Chinese calendar | 丁卯年 (Fire Rabbit) 3845 or 3638 — to — 戊辰年 (Earth Dragon) 3846 or 3639 | 
| Coptic calendar | 864–865 | 
| Discordian calendar | 2314 | 
| Ethiopian calendar | 1140–1141 | 
| Hebrew calendar | 4908–4909 | 
| Hindu calendars | |
| - Vikram Samvat | 1204–1205 | 
| - Shaka Samvat | 1069–1070 | 
| - Kali Yuga | 4248–4249 | 
| Holocene calendar | 11148 | 
| Igbo calendar | 148–149 | 
| Iranian calendar | 526–527 | 
| Islamic calendar | 542–543 | 
| Japanese calendar | Kyūan 4 (久安4年) | 
| Javanese calendar | 1054–1055 | 
| Julian calendar | 1148 MCXLVIII | 
| Korean calendar | 3481 | 
| Minguo calendar | 764 before ROC 民前764年 | 
| Nanakshahi calendar | −320 | 
| Seleucid era | 1459/1460 AG | 
| Thai solar calendar | 1690–1691 | 
| Tibetan calendar | 阴火兔年 (female Fire-Rabbit) 1274 or 893 or 121 — to — 阳土龙年 (male Earth-Dragon) 1275 or 894 or 122 | 
Year 1148 (MCXLVIII) was a leap year starting on Thursday of the Julian calendar.