Harold William McCauley (July 11, 1913 — December 16, 1977) was an illustrator of pulp magazines in the science fiction field.

[3] His work includes a sensational cover for Hotrod Sinners (1962), which was authored by Robert Silverberg under the pseudonym "Don Elliot".

Nightstand was a pioneer in gay and lesbian erotica, and much of its early work had a science fiction tone.

[7] McCauley also did illustration work for Hamling's Rogue, a sophisticated men's pornographic magazine that was a direct competitor to Playboy.

[7] He also worked throughout the 1950s in advertising, creating illustrations for Coca-Cola, Pepsi, Orange Kist, and Schlitz Beer.