The 1030s is the fourth decade of the 11th century.

Events

Europe 
 1030 – On July 29, during the Battle of Stiklestad of Norway, Olav Haraldsson lost to the people he ruled and is killed in the fight. The people he lost to were called "pagan" because they were not Christian. Later on, Olav is made a saint and is called the patron saint of Norway and Rex perpetuum Norvegiae ('the eternal king of Norway', or 'King of Norway forever').
 1030 – The city of Kaunas in Lithuania is founded.
 1030 – The city of Tartu in Estonia is founded.
 1030 – Thalwil, Switzerland, is talked about for the first time
 1030 – Henry I of France fights against his father Robert.
 1031 – Collapse of the Moorish Caliphate of Córdoba.
 1031 – Byzantine general George Maniaces captures Edessa.
 1031 – Henry I becomes King of France
 1031 – Bezprym seizes the throne of Poland from Mieszko II Lambert
 1034 – On April 11, Empress Zoe of Byzantium marries her chamberlain and elevates him to the throne of the Eastern Roman Empire as Michael IV.
 1034 – Free County becomes subject to the Holy Roman Empire.
 1035 – Harald I becomes King of England.
 1035 – Harthacanute becomes king of Denmark.
 1035 – Magnus I becomes king of Norway.
 1035 – William II (the future William I of England) becomes duke of Normandy.
 1035 – Construction on the cathedral of Saint Sabino begins in Bari.
 1035 – Koper is awarded town rights.
 1036 – Edward the Confessor's younger brother Alfred Aetheling is blinded and murdered in an apparent attempt to seize the throne of England from Harold I.
 June 4, 1039 — Henry III becomes King of Germany. 
 1039 – The Abbey of Bec is founded.
 1039 – Bretislav I of Bohemia invades Poland.

Asia 
 1030 – The Song Dynasty Chinese historian and scholar Ouyang Xiu earned his jinshi degree at the age of 22 by passing the highest level tests in the country. This was his third time to take the test. This degree let him work for the government as a scholar-official.
 1030 – Byzantine Emperor Romanus III attacks Syria.
 1030 – Masud begins to rule the Ghaznavid Empire after the death of his father Mahmud.
 1036 – Emperor Go-Suzaku ascends the throne of Japan.

Other 
 1036 – First appearance of the Flower Sermon in Buddhist literature

Births 
 July 26, 1030 — Stanislaus of Szczepanów, Saint Stanislaw (died 1079)
 1030 – Baldwin VI, Count of Flanders (died 1070)
 1030 – Vsevolod I of Kiev (died 1093)
 1031 – Matilda of Flanders, Queen consort of the Kingdom of England
 September 3, 1034 – Emperor Go-Sanjō of Japan (d. 1073)

Deaths 
 April 30, 1030 — Mahmud of Ghazni
 July 19, 1030 — Adalberon, bishop of Laon
 July 29, 1030 — King Olaf II of Norway (born 995)
 September 30, 1030 — William V, Duke of Aquitaine (born 969)
 July 20, 1031 – King Robert II of France (b. 972) 
 September 2, 1031 – Saint Emeric of Hungary
 July 1–July 3, 1035 — Robert I Duke of Normandy at Bythinian Nicaea while on pilgrimage
 October 18, 1035 — Sancho III of Navarre
 November 4, 1035 — Jaromír, duke of Bohemia
 November 12, 1035 — Canute the Great, King of England, of Denmark, of Norway, some of Sweden, and the territories near the legendary Jomsviking stronghold Jomsburg.
 c. February 5, 1036 – Alfred Aetheling, Anglo-Saxon prince
 May 15, 1036 — Emperor Go-Ichijō of Japan (b. 1008)
 June 12, 1036 — Tedald, Bishop of Arezzo
 June 13, 1036 — Ali Az-Zahir, caliph
 1036 – Sweyn Knutsson, son of Canute the Great
 March 10, 1039 — Eudes of Aquitaine, Duke of Gascony
 June 4 – Conrad II (the Elder), Holy Roman Emperor
 1039 – Iago ab Idwal ap Meurig, Prince of Gwynedd
 1039 – Unsuri, Persian poet

References 

1030s