Cosmopolitan, or simply Cosmo, is a magazine published monthly from New York by the Hearst Corporation. It was founded in 1886 as a "magazine for the whole family".
In earlier incarnations, such as under John Brisben Walker from 1889 to 1905, it was one of America's leading markets for fiction, and for a briefer period was known for important investigative journalism. Circulation had been in decline for years before Brown took over and remodelled the magazine.
It was banned in Singapore until recently.