Anton Zwemmer (1892–1979) was a Dutch-born British bookseller, book distributor, art dealer, publisher and collector who founded Zwemmer's Bookshop and the Zwemmer Gallery in London. He was a "friend and patron of many leading artists", from Picasso to Henry Moore and Wyndham Lewis, and he played "an important role in spreading knowledge and appreciation of modern art" in Britain during the 1920s and 1930s.