| Boris Pozern | |
| Native Name Lang: | ru |
| Office: | Mayor of Minsk |
| Term Start: | March 1917 |
| Term End: | July 1917 |
| Predecessor: | Vladimir Drutskoy-Sokolninsky |
| Successor: | Isidor Lyubimov |
| Birth Date: | 7 July 1882 |
| Birth Place: | Nizhny Novgorod, Russian Empire (now Nizhny Novgorod Oblast, Russian Federation) |
| Death Place: | Moscow, Russian SFSR, Soviet Union (now Russia) |
| Party: | All-Union Communist Party (Bolsheviks) |
| Otherparty: | Russian Social Democratic Labour Party (1903–1917) |
Boris Pavlovich Pozern (Russian: Борис Павлович Позерн; 7 July 1882 – 25 February 1939) was a Soviet politician, party official and member of the Troika of the NKVD of the Soviet Union.
Pozerb was born in Nizhny Novgorod to a family of German origin. He became a member of the Russian Social Democratic Labour Party in 1903. After the February Revolution, Pozern became the head of the Minsk Soviet.
A member of the Russian Constituent Assembly of 1918. He was a member of the Central Committee of the 17th Congress of the All-Union Communist Party (Bolsheviks). During the Great Purge, he was arrested on 9 July 1938 and later executed by firing squad in Moscow. After the death of Joseph Stalin, he was rehabilitated in 1957.