|1026 by topic|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Ab urbe condita||1779|
|Balinese saka calendar||947–948|
|English Regnal year||N/A|
|Chinese calendar||乙丑年 (Wood Ox)|
3722 or 3662
— to —
丙寅年 (Fire Tiger)
3723 or 3663
|- Vikram Samvat||1082–1083|
|- Shaka Samvat||947–948|
|- Kali Yuga||4126–4127|
|Japanese calendar||Manju 3|
|Minguo calendar||886 before ROC|
|Seleucid era||1337/1338 AG|
|Thai solar calendar||1568–1569|
1152 or 771 or −1
— to —
1153 or 772 or 0
|Wikimedia Commons has media related to 1026.|
- Spring – King Conrad II, "the Elder", assembles an army of thousands of armored knights for an expedition into Italy. He besieges Pavia and marches to Milan, where he is crowned with the Iron Crown by Archbishop Aribert as king of the Lombards. Duke William V ("the Great") of Aquitaine, who is already en route for Italy, decides to renounce his claim to the Lombard throne and turns back.
- April – Conrad II punishes (with the help of Milanese troops) the citizens of Pavia with starvation, for burning down the Royal Palace. He appoints Aribert as his viceroy ("imperial vicar") in Italy and charges him to ensure that the order is complied with.
- Summer – Conrad II leaves the bulk of his army at the siege of Pavia and marches to Ravenna. The Ravennan militias close the town gates and assault the imperial train. Conrad rallies his troops and takes Ravenna, taking bloody revenge.
- Conrad II proceeds to Pesaro, but a malarian outbreak forces him to withdraw back up north to the Po Valley. He subdues the March of Turin, where Count Ulric Manfred II opposes the election of Conrad.
- Autumn – Pavia falls to the imperial forces. Only the intervention of Odilo of Cluny persuades Conrad to have mercy on the city and the defeated rebels.
- Battle of Helgeå (off the coast of Sweden): Naval forces of King Cnut the Great's North Sea Empire defeat the combined Swedish and Norwegian royal fleets.
- 9-year-old Henry "the Black" is made duke of Bavaria by his father, Conrad II, after the death of his predecessor Henry V.
- Pietro Barbolano becomes 28th doge of Venice.
- June 10 – Hugh II, French viscount and archbishop
- August 28 – Richard II, "the Good", duke of Normandy
- August 30 – Bononio, Lombard hermit and abbot
- September 21 – Otto-William, count of Burgundy
- November 27 – Adalbold II, bishop of Utrecht
- Adelaide-Blanche of Anjou, French queen and regent
- Frederick II, duke of Upper Lorraine (Lotharingia)
- Henry V, duke of Bavaria (House of Luxembourg)
- Hugh IV, lord of Lusignan (approximate date)
- Leo of Vercelli, German archdeacon and bishop