Maryna Aliaksandrauna Arzamasova (née Katowich, Belarusian: Марына Аляксандраўна Арзамасава (Катовіч), Russian: Марина Александровна Арзамасова; born 17 December 1987) is a Belarusian middle-distance runner.

She won a bronze medal at the 2013 European Athletics Indoor Championships in the 800 metres.

[3] In 2019, she won the silver medal in the team event at the 2019 European Games held in Minsk, Belarus.

[4] Her mother, Ravilya Agletdinova was also a middle-distance runner and won the 1500 m European title in 1986 – an achievement which Arzamasava repeated.

[5] In August 2019, Arzamasova was provisionally suspended after testing positive for the banned steroid-like substance LGD-4033.