Margaret Markvardt (born 1 April 2000) is an Estonian backstroke, butterfly, freestyle and medley swimmer.

She has broken 12 Estonian records in swimming, including relay races.

[1] In 2018, she competed in the girls' 50 metre backstroke event at the 2018 Summer Youth Olympics held in Buenos Aires, Argentina.

[2] His father is a retired nordic combined skier Ago.

This biographical article related to an Estonian swimmer is a stub.