upright=1.35|thumb|Portrait of [[Cnut the Great (c. 995–1035)]]
Year 1015 (MXV) was a common year starting on Saturday of the Julian calendar.
Events
<onlyinclude>
By place
Asia
- October – Influential Japanese statesman Fujiwara no Michinaga is appointed to be Associate Regent.
- November – The newly constructed Japanese imperial residence burns down.
- Peacocks arrive from the Chinese Song Empire to Fujiwara's mansion in Japan.
Europe
- July 15 – Vladimir the Great dies at Berestove after a 35-year reign. He is succeeded by his son Sviatopolk I as Grand Prince of Kiev.
- Summer – King Cnut the Great of Denmark launches an invasion of Mercia and Northumbria in England.
- Emperor Henry II launches a German expedition against Duke Bolesław I the Brave. He invades Poland, but is stopped by Bolesław's forces at Krosno, on the Oder River.
- Earl Eric Haakonsson outlaws berserkers in Norway.
- Olaf Haraldsson declares himself King of Norway.</onlyinclude>
Births
- Andrew I ("the Catholic"), king of Hungary (d. 1060)
- Altmann, bishop of Passau (approximate date)
- Ermesinda of Bigorre, queen of Aragon (d. 1049)
- Eustace II, count of Boulogne (approximate date)
- Ferdinand I, king of León and Castile (d. 1065)
- Frozza Orseolo, margravine of Austria (d. 1071)
- Harald Hardrada, king of Norway (d. 1066)
- Herman IV, duke of Swabia (approximate date)
- John Komnenos, Byzantine aristocrat (d. 1067)
- Michael V Kalaphates, Byzantine emperor (d. 1042)
- Otto II, margrave of Montferrat (approximate date)
- Robert Guiscard, Norman nobleman (d. 1085)
- Roger de Beaumont, Norman nobleman (d. 1094)
Deaths
- February 5 – Adelaide, German abbess and saint
- February 13 – Gilbert of Meaux, French bishop
- July 15 – Vladimir the Great, Grand Prince of Kiev
- September 1 – Gero II, margrave of the Saxon Ostmark
- September 12 – Lambert I, count of Louvain (b. 950)
- December 14 – Arduin of Ivrea, king of Italy (b. 955)
- December 20 – Eido I, bishop of Meissen (b. 955)
- date unknown
- Æthelmær the Stout, English ealdorman
- Al-Sharif al-Radi, Persian Shi'ite scholar (b. 970)
- Gavril Radomir, emperor (tsar) of Bulgaria
- Geoffrey (or Godfrey), count of Eu (b. 962)
- Herbert III, count of Vermandois (b. 953)
- Hugh III, count of Maine (approximate date)
- Ibn Furak, Muslim imam and theologian (b. 941)
- Irene of Larissa, empress (tsarina) of Bulgaria
- Liu Zong, Chinese official of the Song Dynasty
- Masawaih al-Mardini, Syrian physician and writer
- Morcar (or Morkere), English minister (thegn)
- Owain ap Dyfnwal, king of Strathclyde (Scotland)
- Rodulf of Ivry, Norman nobleman (approximate date)
- Sigeferth (or Sigefrith), English chief minister
- Vikramaditya V, Indian ruler of the Chalukya Empire