Doctor Anthony Druid, also known as Doctor Droom and Druid, is a fictional mystic and a supernatural monster-hunter appearing in American comic books published by Marvel Comics. Co-created by writer-editor Stan Lee and penciller Jack Kirby, he debuted as Dr. Anthony Droom in Amazing Adventures #1, published in March 1961 (with a cover date of June 1961). Kirby's art was inked by artist Steve Ditko. Dr. Droom appeared in four more issues of Amazing Adventures before his stories discontinued. Over a year later, artist Steve Ditko approached Stan Lee with a new magic character called Mr. Strange. Liking the idea, Stan Lee renamed the character Doctor Strange and wrote an origin story similar to Droom's. Dr. Anthony Droom was finally reintroduced to comics in 1976 in Weird Wonder Tales #19 in a retelling of his origin story which renamed him Dr. Anthony Druid. This retelling included new writing by Larry Lieber, Stan Lee's brother.

Through his knowledge, Doctor Druid has enhanced physical and mental abilities (such as hypnosis and the ability to sense magic) and knows how to counteract magic and protect against it (through rituals and special arrangement of symbols). According to the lore of Marvel Comics, this makes Druid a mystic but not a full sorcerer like Doctor Strange since he does not cast spells that alter the state of people or the environment around him and does not draw power from Earth's magical energy, extra-dimensional energy, or energy linked to magical entities.

Considered a scholar of multiple fields, Anthony Druid is originally a psychiatrist who then becomes an author and physician. After Druid undergoes a series of tests in Tibet, a dying lama and mystic mentally transmits to his mind secrets of how to enhance his own body and mind's power and control, as well as knowledge regarding magic and supernatural threats. Later, it is said Druid also taps into the knowledge of Celtic ancestors regarding magic. With the combined knowledge of both his Celtic ancestors and the Tibetan lama, Druid acts as a magic-based consultant and hero of Earth. Over the years, he has worked with the superhero team known as the Avengers, and it is later said he was part of a group known as the Monster Hunters.

Originally introduced as Dr. Anthony Droom, the character debuted in Amazing Adventures #1 in June 1961. The origin story was written by Stan Lee, penciled by Jack Kirby, and inked by Steve Ditko. In the story, Anthony Droom is referred to as a psychiatrist, scholar, and physician and is independently wealthy. After undergoing a series of tests in Tibet, he is chosen by a dying lama to protect humanity from threats. In this version of the character's origin, he is imparted with all of the lama's knowledge and then is also transformed by magic from his Caucasian appearance to now having the appearance of Asian heritage. He is told that his appearance suits his new knowledge and role. In the subsequent stories of Amazing Adventures, Droom continues to have an Asian appearance and is given a yellow skin tone.

After his origin in issue #1, Dr. Droom starred in stories in Amazing Adventures #2–4 and #6 (1961). Dr. Droom did not appear in the series again afterward, which was retitled as Amazing Adult Fantasy starting with issue #7 (the same series that with its final issue, Amazing Fantasy #15, would introduced Stan Lee and Steve Ditko's creation Spider-Man).

According to Lee, the idea of Doctor Droom was essentially succeeded by Doctor Strange: "... I always liked [Doctor Droom], but I forgot about him. It was a one-shot thing. And one day while we were trying to think of some new heroes, I thought I'd like to bring back a magician". Lee later clarified that the inciting incident to bring forth a magical character similar to Dr. Droom came when Steve Ditko brought him artwork for a character he called Mr. Strange. Stan Lee changed the name to Doctor Strange and gave the character a new version of Dr. Droom's origin, making Stephen Strange a physician who loses the use of his hands and then seeks out help from a sorcerer in the Himalayas for help, only to then become the man's student and return to New York as a sorcerer himself.

In 1976, Marvel editor Roger Stern thought to bring Doctor Droom back for issue #19 of Weird Wonder Tales, a series that reprinted previously published Marvel Comics stories, sometimes with new art. Issue #19 reprinted Dr. Droom's origin story but with some altered and added dialogue by Larry Lieber and with the protagonist now called Doctor Anthony Druid, new name conceived by Len Wein, presumably to avoid confusion with Marvel supervillain Doctor Doom. Druid sported a red outfit in his role as hero and the new version of his origin story removed the idea that the appearance of his racial heritage is altered by magic. Droom's second story was then reprinted in Weird Wonder Tales #20, again with new art work and with his name changed to Doctor Druid. The character then appeared in issues #21-22, but only as a host introducing fantasy stories to the reader. Weird Wonder Tales then ended with issue #23, which contained a reprint of another Droom story from Amazing Adventures. The story was introduced by a new splash page drawn by artist John Byrne. In the story, Droom's drab grey clothing was painted over with Druid's new red uniform.

Druid appeared next in The Incredible Hulk (vol. 2) #210-211 by writer Len Wein, and Ghost Rider (vol. 2) #26 by writer Jim Shooter. During Roger Stern's work as writer of Avengers in the 1980s, Druid frequently appeared as an associate of the team.