Leonid Ofseevich Korchmar (Russian: Леонид Офсеевич Корчмар) is a Russian conductor.
He is an Honoured Artist of the Russian Federation and of the Republic of North Ossetia-Alania and a diploma-winner at the All-Russian Conducting Competition (1981). Since 1989 he has been a conductor in the Mariinsky Theatre (former Kirov Ballet and Opera) in St. Petersburg. Having studied with Ilya Musin, he now also teaches operatic and symphonic conducting in the St Petersburg Conservatory, where his students have included Mikhail Agrest, Christian Knapp, Anu Tali, Sasha Mäkilä, Kristofer Wåhlander and Markku Laakso.