Florence Ryerson (September 20, 1892 – June 8, 1965) was an American playwright, screenwriter and co-author of the script for the 1939 film The Wizard of Oz.

[citation needed] She attended George Pierce Baker’s famous “47 Workshop” at Harvard University, as did her second husband, Colin Campbell Clements.

[11] In 1926, Florence Ryerson joined Metro-Goldwyn-Mayer to work on silent film scripts,[12] among them Adam and Evil and Wickedness Preferred.

She was co-author of the screenplay for The Wizard of Oz, along with frequent collaborator Edgar Allan Woolf and British author Noel Langley.

In the 1930s, Ryerson and Clements acquired the 19th century Workman Ranch in Canoga Park, in the western San Fernando Valley of Los Angeles.

In addition to June Mad, Ryerson and Clements wrote several Broadway plays in the 1940s, including Glamour Preferred, Harriet, and Strange Bedfellows.