Playboy is an American adult entertainment magazine, founded in 1953 by Hugh Hefner and his associates, which has grown into Playboy Enterprises, Inc., reaching into every form of media. Playboy is one of the world's best known brands. In addition to the flagship magazine in the United States, special nation-specific versions of Playboy are published worldwide.

The magazine is published monthly and features photographs of nude women, along with various articles on fashion, sports, consumer goods, and public figures. It also has short fiction by top literary writers, such as Arthur C. Clarke, Ian Fleming, Vladmir Nabokov, and Margaret Atwood. The magazine has been known to express liberal opinions on most major political issues. Playboy's use of "tasteful" nude photos is often classified as "softcore" in contrast to the more "hardcore" pornographic magazines that started to appear in the 1970s in response to the success of Playboy's more explicit rival, Penthouse.

Playboy's original title was to be "Stag Party," but an unrelated outdoor magazine, Stag, contacted Hefner and informed him that they would legally protect their trademark if he were to launch his magazine with that name. Hefner and co-founder and executive vice president Eldon Sellers met to discuss the problem and to seek a new name. Sellers, whose mother had worked for the short-lived Playboy Automobile Company in Chicago, suggested the name "Playboy".

The first issue, published in December 1953, did not carry a date, as Hefner was unsure whether there would be a second issue. The first centerfold was Marilyn Monroe, although the picture used had originally been taken for a calendar, rather than for Playboy. The first issue was an immediate sensation; it sold out within a matter of weeks. Known circulation was 53,991 (Source: Playboy Collector's Association Playboy Magazine Price Guide). The cover price was 50¢. Copies of the first issue in Mint to Near Mint condition fetched over $5,000 in 2002.

The famous logo, depicting the stylized profile of a rabbit wearing a tuxedo bow tie, was designed by art designer Art Paul for the magazine's second issue and has appeared on every issue since; a running joke in the magazine involves hiding the logo somewhere in the cover art or photograph. Hefner said that he chose the rabbit as a mascot for its "humorous sexual connotation", and because the image was "frisky and playful".

An urban legend started about Hefner and the Playmates of the Month because of markings on the front covers of the magazine. From 1955 to 1979 (except for a six month gap in 1976), the "P" in Playboy had a number of stars printed in or around the letter. The legend stated that this was either a rating that Hefner gave to the Playmate according to how attractive she was, the number of times that Hefner had slept with her, or how good she was in bed. The stars, which ranged in number between zero and twelve, actually indicated the domestic or international advertising region for that printing.

Since reaching its peak in the 1970s, Playboy has seen a decline in circulation and cultural relevance because of increased competition in the field it founded — first from Penthouse, Oui, and Gallery in the 1970s; later from pornographic videos; and more recently from lad mags such as Maxim, FHM, and Stuff. In response Playboy has attempted to re-assert its hold on the 18–35 male demographic it once controlled through slight changes to its content and focusing on issues and personalities more appropriate to its audience—such as hip-hop artists being featured in the Playboy Interview.

Christie Hefner, a daughter of Hugh Hefner, became the CEO of Playboy in 1988 and is now also the Chairman of the Board.

The magazine celebrated its 50th Anniversary with the January 2004 issue. Celebrations were held at Las Vegas, Los Angeles, New York, and Moscow during the year to commemorate this event.

The best-selling Playboy edition was the November 1972 edition, which sold 7,161,561 copies. One-quarter (1/4) of all American college men were buying the magazine every month.

Perhaps coincidentally, a cropped image of the issue's centerfold (which featured Lena Soderberg) became a standard image for testing image processing algorithms. It is known simply as the "Lenna" (also "Lena") image in that field
Today, Playboy is still the largest selling men's magazine selling about three million copies a month in the U.S.

In many parts of Asia, including China, Myanmar, Malaysia, Thailand, Taiwan, Singapore, and Brunei, the sale and distribution of Playboy is banned. In addition, its sale and distribution is banned in almost all Muslim countries in Asia and Africa, such as Saudi Arabia and Pakistan. However, it is sold in Hong Kong. In Japan, where the genitals of models cannot be shown, a separate edition of Playboy is published under license by Shueisha

An Indonesian Edition of Playboy launched in April 2006 but the controversy started before the first issue was published. Even the publisher said that the content of the Indonesian edition will be different from the original edition but the government was trying hard to ban it by using pornographic rules since the Indonesian government can't ban any media. A local Muslim Organization, the Islamic Defenders Front (IDF), is also opposed to Playboy being published on the grounds that it is pornography. On April 12 a group of about 150 IDF members clashed with police and stoned the editorial offices of the magazine. Despite this controversy, the edition quickly sold out.

In 1986, the American convenience store chain 7-Eleven removed the magazine from its stores. The store returned Playboy to its shelves in late 2003.

In book stores throughout the world it is common for Playboy, as well as other adult publications, to be put on a higher shelf than other magazines thus keeping them out of the reach of children.

Playboy was not sold in the State of Queensland, Australia during 2004 and 2005 but has returned as of 2006. Furthermore, due to declining sales, the last edition of Australian Playboy published was the January 2000 issue.