| Flag Caption: | Flag |
| Conventional Long Name: | Black Sea Soviet Republic |
| Subdivision: | Soviet Republic |
| Nation: | the Russian SFSR |
| Image Map Caption: | Black Sea SR in the Soviet-controlled Caucasus, May 1918. |
| P1: | Black Sea Governorate |
| Flag P1: | Coat of arms of Chernomorie Governorate 1914.svg |
| S1: | Kuban-Black Sea Soviet Republic |
| Flag S1: | Socialist red flag.svg |
| Year Start: | March 1918 |
| Year End: | May 1918 |
| Capital: | Novorossiysk |
The Black Sea Soviet Republic (March – 30 May 1918) was a republic of the Russian SFSR within the territory that corresponded to Black Sea Governorate in the Russian Empire. Its seat was Novorossiysk.
In May 1918 it was merged with Kuban Soviet Republic into the Kuban-Black Sea Soviet Republic.[1]