Cornelia Wilhelmina "Mien" Marchant (1866-1952) was a Dutch artist.
Marchant was born on 6 June 1866 in Gorinchem. She was a student of Sieger Baukema, , and . Her work was included in the 1939 exhibition and sale Onze Kunst van Heden (Our Art of Today) at the Rijksmuseum in Amsterdam. She was a member of the ' (Artists association Sint Lucas) and the ' (Artists association Laren-Blaricum). Marchant died on 11 July 1973 in Laren, North Holland.