Yvonne Gregory (1889–1970) was a British society photographer.

Gregory married fellow photographer Bertram Park in 1916.^[1] Gregory, Park and Marcus Adams established themselves as the "Three Photographers" and based their collective studio at 43 Dover Street in Mayfair.^[2][3] Their studio was initially funded by the Egyptologist George Herbert, 5th Earl of Carnarvon.^[1] Gregory and Park would collaborate on works, and Gregory would also pose for Park.^[4] She joined the Royal Photographic Society in 1926 and gained her Associate the same year and Fellowship in 1928.^[5] She also exhibited regularly in RPS exhibitions.

Park and Gregory published several books together including 1935's The Beauty of the Female Form.^[4] The book arose from work they had produced for the first international photographic salon, held in Paris in 1933.^[4] Gregory, with and without Park, published extensively in nudist and naturist books and magazines from the 1930s onwards, a subject discussed in detail in Annebella Pollen's 2021 book, Nudism in a Cold Climate.^[6]

With Bertram Park

• Living sculpture: A record of expression in the human figure &c., Batsford, London, 1926. (With G. Montague Ellwood)
• The beauty of the female form, Routledge, London, 1934.
• Sun bathers: A companion volume to "The Beauty Of The Female Form": 48 photographic studies, Routledge, London, 1935.^[7][8]
• Curves and contrast of the human figure, Bodley Head, London, 1936.
• Eve in the sunlight, Hutchinson, 1937.
• A Study of sunlight and shadow on the female form for artists and art students , Bodley Head, London, 1939.