Mary Cockburn Mercer

Mary Cockburn Mercer (1882–1963) was an Australian painter. She spent the 1920s and 1930s in Europe, and the 1940s in Melbourne, Australia. Her final years were spent in France. There she associated with George Bell, William Frater, Lina Bryans and Arnold Shore. She also renewed her friendship with Janet Cumbrae Stewart, who she previously met in Paris in the 1920s.

In the 1940s Mercer exhibited at the Contemporary Art Society in Melbourne.

A group of Mercer's watercolour paintings and drawings from the 1940s were found as a part of a curatorial restructure between The Department of Australian Prints and Drawings in 1999.

in 2022 Mercer was featured in the exhibition QUEER: Stories from the NGV Collection.

Mercer's frank depiction of sexuality is notable within the Australian LGBTQI community.