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.

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.