David Herbert Lawrence was an English writer, novelist, short story writer, poet and essayist. His modernist works reflect on modernity, social alienation and industrialization, while championing sexuality, vitality and instinct. His best-known novels—Sons and Lovers, The Rainbow, Women in Love, and Lady Chatterley's Lover—were the subject of censorship trials for their radical portrayals of sexuality and use of explicit language.

Dorothy Kathleen Broster, usually known as D. K. Broster, was an English novelist and short-story writer. Her fiction consists mainly of historical romances set in the 18th or early 19th centuries. Her best known novel is The Flight of the Heron (1925), set during the Jacobite rising of 1745.

Daisetsu Teitaro Suzuki , self-rendered in 1894 as "Daisetz", was a Japanese-American essayist, philosopher, religious scholar, translator, and writer. He was a scholar and author of books and essays on Buddhism, Zen and Shin that were instrumental in spreading interest in both Zen and Shin to the West. Suzuki was also a prolific translator of Chinese, Japanese, and Sanskrit literature. Suzuki spent several lengthy stretches teaching or lecturing at Western universities, and devoted many years to a professorship at Ōtani University, a Japanese Buddhist school.

Margaret Mary Julia Devlin, known as Daisy Ashford, was an English writer who is most famous for writing The Young Visiters, a novella concerning the upper class society of late 19th century England, when she was just nine years old. The novella was published in 1919, preserving her juvenile spelling and punctuation. She wrote the title as "Viseters" in her manuscript, but it was published as "Visiters".

Dallas Lore Sharp (1870–1929) was an American author and university professor, born in the Haleyville section of Commercial Township, in Cumberland County, New Jersey.

Damon Francis Knight was an American science fiction author, editor, and critic. He is the author of "To Serve Man", a 1950 short story adapted for The Twilight Zone. He was married to fellow writer Kate Wilhelm.

Dane Coolidge was an American author, naturalist, and photographer. He wrote fiction, non-fiction, and articles featuring the American West. He wrote short stories for magazines and made illustrations. His book Rimrock Jones was adapted into the film Rimrock Jones. The Smithsonian Museum has three of his photographs in its collection. He wrote several dozen novels and many tens of short stories.

Daniel John Callahan was an American philosopher who played a leading role in developing the field of biomedical ethics as co-founder of The Hastings Center, the world's first bioethics research institute. He served as the Director of The Hastings Center from 1969 to 1983, president from 1984 to 1996, and president emeritus from 1996 to 2019. He was the author or editor of 47 books.

Daniel Defoe was an English writer, trader, journalist, pamphleteer and spy. He is most famous for his novel Robinson Crusoe, published in 1719, which is claimed to be second only to the Bible in its number of translations. He has been seen as one of the earliest proponents of the English novel, and helped to popularise the form in Britain with others such as Aphra Behn and Samuel Richardson. Defoe wrote many political tracts, was often in trouble with the authorities, and spent a period in prison. Intellectuals and political leaders paid attention to his fresh ideas and sometimes consulted him.

Daniel Dulany Addison was an American clergyman and writer.