Mimi Arnold, also known by her married name Mary Arnold-Wheeler, (born February 27, 1939) is an American former tennis player who was active in the late 1950s and the 1960s.

She became junior singles champion at the 1957 Wimbledon Championships after beating Rosie Reyes in the final.

[3] Her best singles result was reaching the quarterfinal in 1958 where she was lost to sixth-seeded Zsuzsa Körmöczy in three sets.

[3] At the U.S. National Championships her best singles result was reaching the third round in 1965 where she was beaten by fifth-seeded and eventual finalist Billie Jean Moffitt.

In the 1958 Wightman Cup she played one singles match, against Ann Haydon, which she lost in three sets.