The Cosmopolitan Club is a private social club on the Upper East Side of Manhattan, New York City, New York, USA. Located at 122 East 66th Street, east of Park Avenue, it was founded as a women's club and remains a club exclusively for women to this day. Members have included Willa Cather, Ellen Glasgow, Eleanor Roosevelt, Jean Stafford, Helen Hayes, Pearl Buck, Marian Anderson, Margaret Mead, and Abby Aldrich Rockefeller.
In 1909, a club for governesses named itself the Cosmos Club and leased space in the Gibson building on East 33rd Street. This group became, in 1910, the Women's Cosmopolitan Club, "organized," according to the New York Times, "for the benefit of New York women interested in the arts, sciences, education, literature, and philanthropy or in sympathy with those interested." On March 22, 1911 the club was formally incorporated, with Helen Gilman Brown as its president. The other six founding members were Mrs. V. Everett Macy, Mrs. John Sherman Hoyt, Mrs. Albert Herter, Mrs. John D. Rockefeller Jr., Mrs. E.R. Hewitt, and Mrs. Ellwood Hendrick. Dues were twenty dollars a year.
Early joiners were novelists Willa Cather and Ellen Glasgow, violinist Kathleen Parlow, sculptor Anna Hyatt, dancer Adeline Genee, Grace Dodge, and Elizabeth Clift Bacon Custer, widow of General Custer. In 1913 club members put on "An Evening in a Persian Garden," with snake dancers and readings of Persian verse. The success of this fête led to an increase in membership; in 1914, the club moved to larger quarters uptown at 44th Street and Lexington Avenue, and the name was shortened to the Cosmopolitan Club.