Mariette Pathy Allen (born 1940) is a photographer for the transgender, genderfluid, and intersex communities and a writer. She has published five books, Transformations: Cross-dressers and Those Who Love Them (1989), Masked Culture: The Greenwich Village Halloween Parade (1994), The Gender Frontier (2004), TransCuba (2014) and Transcendents: Spirit Mediums in Burma and Thailand (2017). She is an activist for gender consciousness and reflects positivity towards underrepresented communities.
Allen graduated from Vassar College and then attended the Graduate School of Fine Arts at the University of Pennsylvania where she received an MFA in Fine Arts and Painting. She took a photography class off campus and switched her focus from painting to photography.