List of heads of state 1066

Africa

China
- Liao (in North China)
  - Emperor : Liao Daozong (1055–1101)
- Northern song
  - Emperor : Yingzong (1063-1067)
- Xi Xia
  - Emperor : Yìzōng (1048-1067)

India
- Western Chalukya (in the West Indies)
  - King : Vijayaditya VII (1063-1068)
- Chola (in South India)
  - King : Virarajendra Chola (1063-1070)
- Hoysala (in today's Karnataka)
  - King : Vinayaditya (1047–1108)
- Cashmere ( Lohara Dynasty )
  - King : Kalasha (1063-1089)

Khmer
- King : Udayadityavarman II (1050-1066)
- King: Harshavarman III. (1066-1080)

Seljuks Empire
- Great Seljuks
  - Sultan : Alp Arslan (1063-1072)
- Kirman Seljuks
  - Sultan : Qawurd (1048-1073)

England
- King : Edward the Confessor (1042-1066)
- King: Harald II (1066)
- King: Edgar Ætheling (1066)
- King: William I the Conqueror (1066–1087) (1035–1087 Duke of Normandy)

France
- King : Philip I (1060–1108)
- Anjou
  - Count : Gottfried III. (1060-1068)
- Aquitaine
  - Duke : Wilhelm VIII. (1058-1086)
- Auvergne
  - Count : Robert II (1064-1096)
- Brittany
  - Duke : Conan II (1040-1066)
  - Duchess: Hawisa (1066-1072)
- Burgundy (Duchy)
  - Duke : Robert I (1032-1076)
- Burgundy (Free County)
  - Count Palatine : Wilhelm I (1057-1087)
- Maine
  - Count : Robert (1063-1069) (1087-1106 Duke of Normandy)
- Normandy
  - Duke : William II (1035-1087) (1066-1087 King of England)
- Toulouse county
  - Count : Wilhelm IV. (1060-1094)

Holy Roman Empire
- Roman-German king : Heinrich IV. (1056–1105) (from 1084 emperor )
- Bavaria
  - Duke : Otto II. (1061-1070)
- Bohemia
  - Duke : Vratislav II. (1061-1092) (from 1086 king) (1076-1081 Margrave of Lusatia)
- Flanders
  - Count : Balduin V. (1035-1067)
- Holland
  - Count : Dietrich V. (1061-1091)
- Carinthia
  - Duke : Berthold I (1061-1072)
- Lausitz
  - Margrave : Dedo I. (1046-1069, 1069-1075 )
- Luxembourg
  - Count : Konrad I. (1059-1086)
- Meissen
  - Margrave : Otto I. (1062-1067)
- Lower Lorraine
  - Duke : Gottfried III. (1065-1069) (1044-1046 Duke of Upper Lorraine, 1056-1069 Margrave of Tuszien)
- Upper Lorraine
  - Duke : Gerhard (1048-1070)
- Saxony
  - Duke : Ordulf (1059-1072)
- Swabia
  - Duke : Rudolf von Rheinfelden (1057-1079) (1077-1080 antagonist)

Italy
- Amalfi
  - Duke : John II (III) ( 1028-1029, 1029-1034 , 1052-1069)
- Apulia
  - Duke : Robert Guiskard (1057-1085) (until 1058 Graf) (1078-1081 Duke of Benevento)
- Aversa
  - Count : Richard (1049-1078) (1058-1078 Prince of Capua)
- Benevento (common rule)
  - Duke : Landulf VI. ( 1038-1053 , 1054-1077)
  - Duke: Pandulf IV. (1056-1074)
- Capua
  - Prince : Richard I (1058-1078) (1049-1078 Count of Aversa)
- Papal States
  - Pope : Alexander II (1061-1073)
- Montferrat
  - Margrave : Otto II. (1042-1084)
- Naples
  - Duke : Sergius V. (1042-1082)
- Salerno
  - Prince : Gisulf II. (1052-1077)
- Tuscany
  - Margrave : Gottfried (1056-1069) (1044-1046 Duke of Upper Lorraine, 1065-1069 Duke of Lower Lorraine)
- Venice
  - Doge : Domenico I. Contarini (1043-1071)

Norway (1066-1069 joint rule)
- King : Harald III. (1047-1066)
- King: Magnus II (1066-1069)
- King: Olav III. (1066-1093)

Spain
- Aragon
  - King : Sancho I (1063-1094) (1076-1094 King of Navarre)
- Barcelona
  - Count : Raimund Berengar I (1035-1076)
- Kingdom of Galicia
  - King : García (1065-1071, 1072-1073 )
- Castile
  - King : Sancho II. (1065-1072) (1071-1072 King of Galicia, 1072 King of León)
- Leon
  - King : Alfonso VI. (1065–1072, 1072–1109 ) (1073–1109 King of Galicia, 1072–1009 King of Castile)
- Navarre
  - King : Sancho IV (1054-1076)

Zeta (in present-day Montenegro)
- Prince : Mihailo Vojislavljević (around 1055 – around 1082)