Year 1029 (MXXIX) was a common year starting on Wednesday of the Julian calendar.

• Prince Pandulf IV of Capua becomes the de facto ruler of southern Italy – holding Capua and Naples himself – this in support with his powerful allies Amalfi, Salerno and Benevento. Only the Duchy of Gaeta remains out of his grasp.
• Rainulf Drengot, head of a mercenary band of Norman knights, is approached by Duke John V of Gaeta and is persuaded to change sides. With Norman help, Duke Sergius IV recovers Naples from Capuan occupation.
• Duke Bretislav I (Bohemian Achilles) of Bohemia of the Přemyslid Dynasty reconquers Moravia from Poland (approximate date).

• The seat of the Bishopric of Zeitz is moved to Naumburg (Saxony-Anhalt) in Central Germany.

• January 20 – Alp Arslan (Heroic Lion), sultan of the Seljuk Empire (d. 1072)
• July 5 – Al-Mustansir Billah, caliph of the Fatimid Caliphate (d. 1094)
• Abū Ishāq Ibrāhīm al-Zarqālī, Arab astrologer and astronomer (d. 1087)
• Al-Humaydī, Andalusian scholar and writer of Islamic studies (d. 1095)
• Clement III, antipope of the Catholic Church (approximate date)
• Kaoruko (or Saien-no Kogo), Japanese empress consort (d. 1093)
• Said al-Andalusi, Moorish astronomer and mathematician (d. 1070)
• Ulrich of Zell (or Wulderic), German abbot and saint (d. 1093)

• January 20 – Heonae, Korean queen consort and regent (b. 964)
• January 27 – Unwan (or Unwin), archbishop of Hamburg-Bremen
• May 28 – Herman of Ename, count of Verdun (Lower Lorraine)
• Abu'l-Qasim Jafar, Buyid statesman and vizier (Fasanjas family)
• Al-Karaji, Persian mathematician and engineer (approximate date)
• Fujiwara no Kinsue, Japanese statesman and courtier (b. 957)
• Fujiwara no Tametoki, Japanese nobleman (approximate date)
• Haakon Ericsson, Norwegian Viking nobleman (approximate date)
• Ibn al-Kattani, Moorish astrologer, poet and physician (b. 951)
• Kushyar Gilani, Persian mathematician and geographer (b. 971)
• Lu Zongdao, Chinese official and politician (approximate date)
• Salih ibn Mirdas, Arab founder of the Mirdasid Dynasty^[1]