Truman W. "True" Williams (March 22, 1839 – November 23, 1897) was an American artist known as the most prolific illustrator to Mark Twain's books and novels.

One of his earliest published works appeared in Harper's Weekly in April 1862, illustrating Confederate prisoners of the Civil War.

[7][1] "Williams was a man of great talent—of fine imagination and sweetness of spirit—but it was necessary to lock him in a room when industry was required, with nothing more exciting than cold water as a beverage."

- Albert Bigelow Paine [8] Williams' first work for Twain was The Innocents Abroad, of which he contributed the majority of illustrations.

Biographer Albert Bigelow Paine calls Innocents "Twain's greatest book of travel", and writes: "we may believe that Williams was not a great draftsman, but no artist ever caught more perfectly the light and spirit of the author's text.

"[9] Literary critic Michael Patrick Hearn describes Williams as "an indifferent draftsman, his pictures varying from coarse to the highly sentimental".