List of state leaders in 1355

Africa

Ahom - Sukhrampha, King of Ahom (1332-1364)
Bahmani Sultanate - Ala-ud-Din Bahman Shah (1347–1358)
China (Yuan Dynasty) - Emperor Huizong (1333–1370)
Kingdom of Chūzan
1. Seii (1337–1355)
2. Satto (1355–1395)
Kingdom of Hokuzan - Haniji (1322–1395)
Japan (Muromachi period)
- Monarch (Northern Pretender) - Emperor Go-Kōgon (1352–1371)
- Monarch (Southern Court) - Emperor Go-Murakami (1339–1368)
- Shogun (Ashikaga) - Ashikaga Takauji (1338–1358)
Korea (Goryeo Kingdom) - Gongmin (1351–1374)
Lan Xang (Laos) - Fa Ngoum (1354–1373)
Madurai Sultanate - Nasir-ud-Din Mahmud Damghani, Sultan of Madurai (1344-1356)
Kingdom of Nanzan - Ofusato (1337–1396)

Bulgarian Empire - Ivan Alexander, Tsar of Bulgaria (1331–1371)
Byzantine Empire -
- John VI Cantacuzenus (1347–1355)
- John V Palaeologus (1341–1384)
Crown of Castile - Peter I (1350–1391)
Kingdom of Denmark - Valdemar IV (1340–1375)
Kingdom of England - Edward III (1327–1377)
Kingdom of France - John II (1350–1364)
Holy Roman Empire (House of Luxembourg) - Charles IV (1347–1378)
- Duchy of Bavaria-Straubing (House of Wittelsbach) -
  - William I (1347–1388)
  - Albert (1347–1404)
- County of Hainaut (House of Avesnes) - Margaret, Countess of Hainaut (1347–1356)
- County of Holland (House of Wittelsbach) - William I, Duke of Bavaria-Straubing (1354–1388)
- Palatinate of the Rhine (House of Wittelsbach) - Rupert I, Elector Palatine (1353–1390)
Grand Duchy of Lithuania - Algirdas (1345–1377)
Kingdom of Norway
- Monarch - Haakon VI (1343–1380)
- defacto - Magnus VII, Regent (1319–1355 (as defacto 1343–1355))
Kingdom of Portugal - Afonso IV (1325–1357)
Kingdom of Sweden - Magnus II (1319–1363)
Principality of Taranto - Louis (1346–1362)
Kingdom of Naples - Joan I (1343–1382)
Principality of Achaea - Robert (1332–1364)
Grand Duchy of Moscow - Ivan II (1353–1359)
Principality of Wallachia - Nicolae Alexandru, Voivode of Wallachia (1352–1364)