Marion Post Wolcott (June 7, 1910 – November 24, 1990) was an American photographer who worked for the Farm Security Administration during the Great Depression, documenting poverty, the Jim Crow South, and deprivation.

When she found that the Philadelphia Evening Bulletin kept sending her to do "ladies' stories", Ralph Steiner took her portfolio to show Roy Stryker, head of the photography division of the Farm Security Administration, and Paul Strand wrote a letter of recommendation.

In 1938, the WPA photographer Marion Post Wolcott took a photo of Geneva Varner Clark of Varnertown alongside her three children.

The caption of the photos identifies Varner as a Brass Ankle, a derogatory term used to refer to someone of mixed race that passes as white.

[citation needed] In 1941 she met Leon Oliver Wolcott, deputy director of war relations for the U.S. Department of Agriculture under Franklin Roosevelt.

Wolcott found it difficult to fit in her photography around raising a family and a great deal of traveling and living overseas.

In 1978, Wolcott mounted her first solo exhibition in California, and by the 1980s the Smithsonian and the Metropolitan Museum of Art began to collect her photographs.