|Centuries:||11th century · 12th century · 13th century|
|Decades:||1090s · 1100s · 1110s · 1120s · 1130s · 1140s · 1150s|
|Years:||1123 · 1124 · 1125 · 1126 · 1127 · 1128 · 1129|
|1126 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Art and literature|
|1126 in poetry|
|Ab urbe condita||1879|
|English Regnal year||26 Hen. 1 – 27 Hen. 1|
|Chinese calendar||乙巳年 (Wood Snake)|
3822 or 3762
— to —
丙午年 (Fire Horse)
3823 or 3763
|- Vikram Samvat||1182–1183|
|- Shaka Samvat||1047–1048|
|- Kali Yuga||4226–4227|
|Japanese calendar||Tenji 3 / Daiji 1|
|Minguo calendar||786 before ROC|
|Seleucid era||1437/1438 AG|
|Thai solar calendar||1668–1669|
|Wikimedia Commons has media related to 1126.|
- January–March – In Song dynasty China, scholars and farmers demonstrate around Kaifeng for the restoration of a trusted military official, Li Gang (李綱). Small conflicts erupt between the protestors and the government.
- January 18 – Emperor Huizong of Song abdicates in favour of his son Qinzong.
- The Song dynasty loses the Yellow River valley to the Jin dynasty in the Jin–Song Wars. Remnants of the court flee south, including much of the populace and communities such as the Kaifeng Jews.
- Two previously written Chinese pharmaceutical works, one by Shen Kuo and another by Su Shi, are combined into one written work.
- March 10 – Alfonso VII is crowned king of Castile and León in Spain.
- Rutherglen becomes one of the first Royal Burghs in Scotland.
- Ragnvald Knaphövde, pretender to the Swedish throne, is killed by upset peasants at a local thing. Sweden is without ruler, but Magnus the Strong claims sovereignty over Gothenland for the time being.
- King Alfonso the Battler of Navarre and Aragon launches a raid into Granada.
- The Venetians occupy Cephalonia. Byzantine Emperor John II Komnenos restores their trading privileges.
- Olegarius creates the community of knights known as the confraternity of Tarragona to combat the Andalusians in Catalonia.
- Adelard of Bath translates Muḥammad ibn Mūsā al-Khwārizmī's arithmetic and astronomical tables into Latin.
- Fan Chengda, Chinese poet, travel writer, and geographer (d. 1193)
- Averroes, Andalus judge and physician
- Eynion de Tilston, Norman English knight and lord of the manor
- February 10 – William IX, Duke of Aquitaine and poet (b. 1071)
- March 8 – Queen Urraca of León and Castile (b. 1082)
- October 1 – Morphia of Melitene, Queen of Jerusalem
- Edgar the Ætheling, last member of the Anglo-Saxon royal house (b. 1052)
- Ragnvald Knaphövde, pretender to the Swedish throne (killed by upset peasants at the thing)
- Abbot Ekkehard of Aura
- Omar Khayyám, Persian poet and mathematician
- Al-Tutili, Andalusian poet