Ken Marcus (born October 2, 1946) is a famous American photographer, best known for his work in glamour and erotic photography with Penthouse and Playboy magazines and for his own website.

He studied with landscape photographer, Ansel Adams in Yosemite National Park for 13 years[1] as well as with Brett Weston, Paul Caponigro, Wynn Bullock, Imogen Cunningham and Judy Dater, all of whom influenced his early work.

Throughout his 20s, Marcus's commercial assignments included product and fashion catalogs, architectural interiors, food illustration, magazine editorials and advertising photography.

He also photographed musicians for album covers and posters, including the inside gatefold of George Harrison's Living in the Material World.

[1] Throughout his career, Marcus has done black and white portraits of celebrities such as Kareem Abdul-Jabbar, Virginia Madsen, Fabio Lanzoni, Vincent Price, Pamela Anderson, and Tom Arnold.

The images of Jimi Hendrix, Janis Joplin, The Who, Simon & Garfunkel, and Brian Jones of the Rolling Stones were rediscovered in 2005 during a studio remodel.

[6] In the comic book series Rocketeer, artist Dave Stevens portrayed Marcus as the nefarious Marco of Hollywood with a readily identifiable caricature.