Margarita Sergeyevna Aliychuk (, born 10 August 1990) is a Russian group rhythmic gymnast and Olympic champion.
Aliychuk was a member of the gold medal-winning Russian group at the 2007 World Championships in Patras, Greece. She was also a member of the Russian group that competed at the 2008 Summer Olympics in Beijing where she received a gold medal in the rhythmic group competition.
Aliychuk is a resident of the city of Omsk, Russia.