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| Adelaide of Hesse | |
|---|---|
 An 1865 imagining of Adelaide by Polish painter Jan Matejko | |
| Queen consort of Poland | |
| Tenure | 1341–1356 (de facto) 1341–1370 (de jure) |
| Coronation | 29 September 1341 |
| Born | c. 1324 |
| Died | c. 1371 (aged 46–47) |
| Spouse | Casimir III of Poland |
| House | Hesse (by birth) Piast (by marriage) |
| Father | Henry II, Landgrave of Hesse |
| Mother | Elisabeth of Thuringia |
Adelaide of Hesse (Polish: Adelajda Heska, German: Adelheid von Hessen; after 1323 – after 26 May 1371) was a noble of the House of Hesse by birth and the queen consort of Poland by marriage to Casimir III of Poland. She was the eldest daughter of Henry II, Landgrave of Hesse, and his wife Elisabeth of Thuringia (1306–1367), daughter of Frederick I, Margrave of Meissen.