| Conflict: | Battle of Jastków |
| Partof: | Russian Great Retreat during First World War |
| Date: | July 31 – August 3, 1915 |
| Place: | Jastków, Russian Empire |
| Result: | Austro-Hungarian victory |
| Combatant2: | Russian Empire |
| Commander1: | Józef Piłsudski Bolesław Roja |
| Commander2: | Unknown |
The Battle of Jastków was a World War I battle that took place July 31–August 3, 1915, near the village of Jastków, then part of the Russian Empire. It was a major clash between the Russian Army and the Austro-Hungarian Polish Legions (primarily the 1st Brigade, Polish Legions). It was one of the Legion's largest engagements, and its first major one. The battle ended with the Austro-Hungarian and Polish victory, as the Russian forces retreated.