List of state leaders in 1090

Africa

Almoravids - Yusuf ibn Tashfin (1061–1106)
Empire of Ethiopia - Kedus Harbe (1079–1119)
Fatimid Caliphate - Ma'ad al-Mustansir Billah (1036–1094)
Hammadids - al-Mansur ibn an-Nasir (1088–1104)
Ifriqiya (Zirid) - Tamim ibn al-Muizz (1062–1108)
Kingdom of Makuria - Basileios (1089–1130)
Wagadou (Ghana Empire) -
1. Kambine Diaresso (1087-1090s)
2. Suleiman (1090s-1100s)

Armenia Minor - Ruben I, King of Armenia (1080–1095)
Byzantine Empire - Alexios I Komnenos (Αλέξιος Α' Κομνηνός) (1081–1118)
China (Northern Song Dynasty) - Emperor Zhezong (1085–1100)
Japan (Heian period) -
- Monarch - Emperor Horikawa (1087–1107)
- Regent (Sesshō) - Fujiwara no Morozane, Sesshō (1087–1091) or Kampaku (1075–1087; 1091–1094)
- Cloistered ruler - Emperor Shirakawa, Jōkō of Japan (1087–1129)
Korea (Goryeo Kingdom) - Seonjong (1083–1094)
Liao (Khitan Empire) - Emperor Daozong (1055–1101)
Great Seljuq Empire- Malik-Shah I (1072–1092)
Western Xia - Emperor Chongzong (1086–1139)
Persia - Melek Sha Leader of the Buyi dinasty

Byzantine Empire - Alexius I Comnenus (1081–1118)
Croatia - Stjepan II of Croatia, King of Croatia (1089–1091)
Kingdom of England - William II (1087–1100)
Kingdom of France - Philip I (1060–1108)
Holy Roman Empire - Henry IV, King of the Romans (1056–1087), Holy Roman Emperor (1084–1105)
- West Friesland - Dirk V, Count of West Friesland (1061–1091)
Duchy of Poland - Władysław I Herman (1079–1102)
Kingdom of Scotland - Malcolm III (1058–1093)
Norman Kingdom of Naples - Roberto
Norman Kingdom of Sicily - Roger I
Kingdom of Aragon - Sancho Ramirez
Kingdom of Castile - Alfonso VI
Kingdom of Norway - Olav III
Kingdom of Denmark - Olaf I
Kingdom of Sweden - Inge the Elder
Kievan Rus' - Vsievolod I
Kingdom of Poland - Władysław I Herman, Duke of Poland
Kingdom of Hungary - Ladislao I