Alfred Henry Lewis (January 20, 1855 – December 23, 1914) was an American investigative journalist, lawyer, novelist, editor, and short story writer,^[1] who sometimes published under the pseudonym Dan Quin.^[2]

Lewis began as a staff writer at the Chicago Times, and eventually became editor of the Chicago Times-Herald.^[3] By the late 19th century he was writing muckraker articles for Cosmopolitan. As an investigative journalist, Lewis wrote extensively about corruption in New York politics.^[3] In 1901 he published a biography of Richard Croker (1843–1922), a leading figure in the corrupt political machine known as Tammany Hall, which exercised a great deal of control over New York politics from the 1790s to the 1960s.

As a writer of genre fiction, his most successful works were Westerns from his Wolfville series, which he continued writing until he died of gastrointestinal disease in 1914.