873 state leaders - Events of 874 - 875 state leaders - State leaders by year
Asia
- Bohai/Balhae - Da Xuanxi/Dae Hyeon-seok, King of Bohai/Balhae (871-895)
- China (Tang Dynasty) - Xizong, Emperor of Tang China (873-888)
- Gurjara - Mihira Bhoja I, Pratihara King of Gurjara (c. 836-886)
- Japan - Seiwa, Emperor of Japan (858-876)
- Silla - Gyeongmun, King of Silla (861-875)
Europe
- Danelaw - Guthrum, King of the Danelaw (854–890)
- East Anglia* - Oswald, King of East Anglia (870–876)
- Mercia* - Ceolwulf II, King of Mercia (873–879)
- Northumbria* - Ricsige, King of Northumbria (872–876)
- England (Saxon) - Ælfred the Great, King of England (871–899)
- Ireland - Aedh Finnliath, High King of Ireland (861–876)
- Scotland - Constantine I, King of Scots and Picts (862–877)
- Strathclyde - Rhun f Arthgal, King of Strathclyde (871–878)
- Wales - Rhodri Mawr ap Merfyn, King of Gwynedd (844–878)
*Northumbria, East Anglia and Mercia had ceased to be autonomous and independent kingdoms by this time.