Henry Martyn Baird was an American historian and educator. He is best known as a historian of the Huguenots.

Henry Mayhew was an English journalist, playwright, and advocate of reform. He was one of the co-founders of the satirical magazine Punch in 1841, and was the magazine's joint editor, with Mark Lemon, in its early days. He is also known for his work as a social researcher, publishing an extensive series of newspaper articles in the Morning Chronicle that was later compiled into the book series London Labour and the London Poor (1851), a groundbreaking and influential survey of the city's poor.

Henry Melvill Gwatkin was an English theologian and church historian.

Henry Milner Rideout (1877–1927) was a native of Calais, Maine. Author of sixteen novels, twenty-three short stories and novellas, and a biographical memoir, he also was editor of one college textbook, as well as co-editor of three others. Many of his stories appeared in The Saturday Evening Post.

Henry More was an English philosopher of the Cambridge Platonist school.

Henry Osborn Taylor was an American historian and legal scholar.

Henry Philip Tappan was an American philosopher, educator and academic administrator. He is officially considered the first president of the University of Michigan.

Henry Pratt Fairchild was a distinguished American sociologist who was actively involved in many of the controversial issues of his time. He wrote about race relations, abortion and contraception, and immigration. He was involved with the founding of Planned Parenthood and served as President to the American Eugenics Society.

Henry Reed Stiles was an American physician who wrote several historical records and genealogical books. As a doctor, he served in various medical positions primarily in New York City, although he spent four years in Dundee, Scotland. He was very interested in genealogical and historical research. As of 2011, his work continued to be widely cited by researchers and remained in print more than 115 years later.

Henry Seidel Canby was a critic, editor, and Yale University professor.