| Conflict: | Battle of Syniava |
| Partof: | Gorlice–Tarnów offensive during the Eastern Front of the World War I |
| Date: | 13–15 May 1915 |
| Place: | Stara Syniava, Austria-Hungary |
| Result: | Russian victory |
| Combatant2: | Russian Empire |
| Commander1: | Archduke Joseph Ferdinand of Austria |
| Commander2: | |
| Strength1: | 113,000 |
| Strength2: | Unknown |
| Casualties1: | Heavy 7,436 captured |
| Casualties2: | Medium |
Battle of Syniava (Russian: Битва под Синявами); The operation of the Russian army during the offensive of the central powers in Galicia. The operation was carried out in order to divert the attention of the Austro-Hungarian command from Przemysl, which was under threat of capture, despite a decisive tactical victory and a large advance deep into the territory, it was not possible to distract the enemy's attention.
The offensive began on the night of May 13, the attack on the Austrian positions near Sinyavy was carried out very successfully for the Russians, 2,500 prisoners and an entire line of trenches were captured with almost no losses. And by May 14, the Russians had achieved success in other areas of the offensive, The 3rd Caucasian Corps in the northern direction took another 1,000 prisoners.On the afternoon of the same day, the Austro-Hungarians tried to launch a counteroffensive, but failed, although they inflicted significant losses on the Russian offensive began on May 15, also successful, the Austrians, under the onslaught of the Russians, went to the other side of the San river.