| Leszek II the Black | |
|---|---|
 | |
| High Duke of Poland | |
| Reign | 1279–1288 |
| Predecessor | Bolesław V the Chaste |
| Successor | Henryk IV Probus |
| Born | c. 1241 Brześć Kujawski |
| Died | 30 September 1288 (aged 46–47) Kraków |
| Burial | Dominican Church of the Holy Trinity, Kraków |
| Spouse | Gryfina of Halych |
| House | House of Piast |
| Father | Casimir I of Kuyavia |
| Mother | Constance of Wrocław |
Leszek II the Black (c. 1241 – 30 September 1288), was a Polish prince of the House of Piast, Duke of Sieradz since 1261, Duke of Łęczyca since 1267, Duke of Inowrocław in the years 1273-1278, Duke of Sandomierz and High Duke of Poland from 1279 until his death.