Warren James Hinckle III (October 12, 1938 – August 25, 2016) was an American political journalist based in San Francisco.

[1] Hinckle is remembered for his tenure as editor of Ramparts magazine, turning a sleepy publication aimed at a liberal Roman Catholic audience into a major galvanizing force of American radicalism during the Vietnam War era.

Under his leadership, it became a widely circulated muckraking magazine that was based in San Francisco and heavily involved in antiwar New Left politics.

Contributing editor Ralph J. Gleason resigned in protest and turned his attention to a new magazine, Rolling Stone, which he co-founded with former Ramparts staffer Jann Wenner; its first issue appeared later that year.

There he matched illustrator Ralph Steadman with Hunter S. Thompson to produce "The Kentucky Derby Is Decadent and Depraved" (1970), the first work of Gonzo journalism.