Marsel Efroimski (Hebrew: מרסל אפרוימסקי‎‎; born February 13, 1995) is an Israeli chess player.

She was introduced to chess by her grandfather in her hometown of Kfar Saba, and has been competing internationally for three years. Her parents immigrated to Israel from the former Soviet Union.[1]

Efroimski won the World Youth Chess Championship twice, Girls Under-12 at Kemer in 2007, and Girls Under-14 at Antalya in 2009,[2] as well as the Under-14 girls European Youth Chess Championship at Fermo in 2009.[3][4]

She represented Israel in the Women's Chess Olympiad at Dresden 2008,[5] at Khanty-Mansiysk 2010,[6] and at Istambul 2012[7] She was awarded the Woman FIDE Master title in 2008, and the Woman International Master title in 2011.[8]

In 2011, Efroimski shared first place (with four other players) in the Girls under-16 European Youth Chess Championship in Albena. On points, she got the third place.[9]