Robert Stuart Redfield (2 May 1849 – 28 Apr 1921) was an American photographer from Philadelphia involved in pictorialism. He was a president of the Photographic Society of Philadelphia and a founding member of the Photo-Secession movement.[1][2][3] Redfield was born in New York City on May 2, 1849, the third child of Mary Jane and John Howard Redfield.[4] He married Mary Thibault Guillou, and with her had four children, including the mathematician J. Howard Redfield and the naturalist Alfred C. Redfield.[5]