Soběslav I, Duke of Bohemia
| Soběslav I | |
|---|---|
| Duke of Bohemia | |
| Reign | 12 April 1125 – 14 February 1140 |
| Predecessor | Vladislaus I |
| Successor | Vladislaus II |
| Born | c. 1075 |
| Died | 14 February 1140 (aged 64–65) |
| Spouse | Adelaide of Hungary |
| Issue | Wenceslaus II Udalrich of Olomouc Maria of Bohemia Soběslav II Vladislaus |
| House | Přemyslid dynasty |
| Father | Vratislaus II |
| Mother | Świętosława of Poland |
Soběslav I (also Sobeslaus; c. 1075 – 14 February 1140) was Duke of Bohemia from 1125 until his death in 1140. He was a member of the Přemyslid dynasty, the youngest son of Vratislaus II (d. 1092), by his third wife Świętosława of Poland.