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|1002 in topic|
|Lists of leaders|
|Political entities - State leaders - Religious leaders|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Ab urbe condita||1755|
|Balinese saka calendar||923–924|
|English Regnal year||N/A|
|Chinese calendar||辛丑年 (Metal Ox)
3698 or 3638
— to —
壬寅年 (Water Tiger)
3699 or 3639
|- Vikram Samvat||1058–1059|
|- Shaka Samvat||923–924|
|- Kali Yuga||4102–4103|
|Japanese calendar||Chōhō 4
|Minguo calendar||910 before ROC
|Seleucid era||1313/1314 AG|
|Thai solar calendar||1544–1545|
1128 or 747 or −25
— to —
1129 or 748 or −24
|Wikimedia Commons has media related to 1002.|
- King Suryavarman I defeats the armies of Udayadityavarman I, eventually becoming ruler of the Khmer Empire.
- December – Khalaf I of Sistan surrenders to the Ghaznavids in Taq.
- January 8 – Wulfsige III, Bishop of Sherborne, dies and is succeeded by Æthelric.
- January 23 – Henry II succeeds Otto III, as King of Germany.
- June – Frederick is sent as an imperial legate to the Synod of Pöhlde, to mediate between the claims of Bishop Bernard of Hildesheim, and Willigis, Archbishop of Mainz, concerning the control of Gandersheim Abbey.
- July – Battle of Calatañazor: Christian armies of Castille, led by Count Sancho García, and León, led by Alfonso V, defeat invading Muslim forces under Almanzor.
- August 8 – Abd al-Malik succeeds Almanzor, chief minister of the Umayyad Caliphate of Córdoba, Spain.
- November 13 – St. Brice's Day massacre: English king Æthelred the Unready orders all Danes in England killed.
- November – Frederick is elected Archbishop of Ravenna.
- Vladivoj succeeds Boleslaus III, Duke of Bohemia.
- Otto of Worms withdraws his nomination for the title of Holy Roman Emperor, and receives the Duchy of Carinthia in return.
- King Æthelred the Unready of England marries (as his second wife) Emma, daughter of Richard I, Duke of Normandy.
- Brian Boru, King of Leinster and Munster, becomes High King of Ireland, breaking the Uí Néill monopoly on the title. Not satisfied with the submission of Máel Sechnaill mac Domnaill, Brian Boru makes an expedition to the north, to take hostages from the northern states.
- John IV of Naples is probably released from German captivity by Henry II, Holy Roman Emperor.
- With a new group of colonists, an epidemic hits the Viking colony in Greenland.
- Danegeld is paid by Æthelred the Unready, to prevent Viking raids against England.
- June 21 – Pope Leo IX (d. 1054)
- Adolf II of Lotharingia (d. 1041)
- Al-Khatib al-Baghdadi, Sunni Muslim scholar and historian (d. 1071)
- George I of Georgia (possible date; d. 1027)
- Mei Yaochen, Chinese poet of the Song dynasty (d. 1060)
- Alice of Normandy, countess consort of Burgundy (d. 1038)
- Nikephoros III Botaneiates, Byzantine emperor (d. 1081)
- January – Sa'id al-Dawla, Hamdanid Emir of Aleppo, poisoned
- January 23 – Otto III, Holy Roman Emperor (b. 980)
- April 30 – Eckard I, Margrave of Meissen, assassinated
- May 6 – Ealdwulf, Archbishop of York, Abbot of Peterborough and Bishop of Worcester
- August 8 – Almanzor, chief minister of the Umayyad Caliphate of Córdoba, Spain
- October 15 – Otto-Henry, Duke of Burgundy (b. 946)
- November 13
- Godfrey I, Count of Verdun
- Rogneda of Polotsk, princess, married to Vladimir I of Kiev before his conversion to Christianity
- Tahir, son of Khalaf I
- date unknown