Zakhar Arzamastsev (born November 6, 1992) is a Russian professional ice hockey Defenseman who currently plays with HC Spartak Moscow of the Kontinental Hockey League (KHL). Arzamastsev made his KHL debut playing with Metallurg Novokuznetsk during the 2009–10 KHL season. Following a brief stint with Rytíři Kladno in the Czech Extraliga (ELH), Arzamastsev returned to the KHL after signing a one-year contract with Spartak Moscow for the 2022–23 season on 16 July 2022.