Florenz Edward Ziegfeld Jr. (/ˈzɪɡfɛld/; March 21, 1867 – July 22, 1932) was an American Broadway impresario, notable for his series of theatrical revues, the Ziegfeld Follies (1907–1931), inspired by the Folies Bergère of Paris. He also produced the musical Show Boat. He was known as the "glorifier of the American girl". Ziegfeld is a member of the American Theater Hall of Fame.

Florenz Edward Ziegfeld Jr. was born on March 21, 1867, in Chicago, Illinois. His mother, Rosalie (née de Hez), who was born in Belgium, was the grandniece of General Count Étienne Maurice Gérard. His father, Florenz Edward Ziegfeld, was a German immigrant whose father was the mayor of Jever in Friesland. Ziegfeld was baptized in his mother's Roman Catholic church. His father was Lutheran. As a child Ziegfeld witnessed the Chicago fire of 1871.

His father ran the Chicago Musical College and later opened a nightclub, the Trocadero, to profit from the 1893 World's Fair. To help his father's nightclub succeed, Ziegfeld hired and managed the strongman Eugen Sandow.

In London, during a trip to Europe, Ziegfeld met Anna Held, a Polish-French singer of Jewish descent. His promotion of Held in America brought about her meteoric rise to national fame. It was Held who first suggested an American imitation of the Parisian Folies Bergère to Ziegfeld. Her success in a series of his Broadway shows, especially A Parisian Model (1906), was a major reason for his starting a series of lavish revues in 1907. Much of Held's popularity was due to Ziegfeld's creation of publicity stunts and rumors fed to the American press.

Ziegfeld's stage spectaculars, known as the Ziegfeld Follies, began with Follies of 1907, which opened on July 7, 1907, and were produced annually until 1931. These extravaganzas, with elaborate costumes and sets, featured beauties chosen personally by Ziegfeld in production numbers choreographed to the works of prominent composers such as Irving Berlin, George Gershwin and Jerome Kern. The Follies featured the famous Ziegfeld girls, female chorus dancers who wore elaborate costumes and performed in synchronization.

The Follies featured many performers who, though well known from previous work in other theatrical genres, achieved unique financial success and publicity with Ziegfeld. Included among these are Nora Bayes, Fanny Brice, Ruth Etting, W. C. Fields, Eddie Cantor, Marilyn Miller, Will Rogers, Bert Williams and Ann Pennington.

At a cost of $2.5 million, Ziegfeld built the 1600-seat Ziegfeld Theatre on the west side of Sixth Avenue between 54th and 55th Streets. Designed by Joseph Urban and Thomas W. Lamb, the auditorium was egg-shaped, with the stage at the narrow end. A huge medieval-style mural, The Joy of Life, covered the walls and ceiling. To finance the construction, Ziegfeld borrowed from William Randolph Hearst, who took control of the theater after Ziegfeld's death.

The Ziegfeld Theatre opened in February 1927 with Ziegfeld's production of Rio Rita, which ran for nearly 500 performances. This was followed by Show Boat, a great hit with a run of 572 performances. This musical, which concerned racial discrimination in the South during the late nineteenth century, was a collaboration between Ziegfeld, Urban, and composer Jerome Kern. The musical has been revived four times on Broadway, winning multiple Tony Awards. The score features several classics such as "Ol' Man River" and "Can't Help Lovin' Dat Man".