Leonid Faivelevych Barbier (Ukrainian: Леонід Файвелевич Барбієр, Russian: Леонид Файфелевич Барбиер; 9 April 1937 – 15 January 2023) was a Ukrainian swimmer.

He competed at the 1960 Summer Olympics in the 100 m backstroke and 4 × 100 m medley relay and finished in fifth place in both events.

Around 1989 he was active in masters swimming, winning three European and national titles.

In 1989 he also briefly acted as president of the Moscow federation of masters swimming.

This biographical article related to a Ukrainian swimmer is a stub.