Francis Regis St. John (June 16, 1908 – July 19, 1971)[1][2][3] was an American librarian and director of the Brooklyn Public Library from 1949 to 1963.

He attended Northampton High School and worked in the Forbes Library as a page and desk assistant.

In 1939, he became assistant director under Joseph L. Wheeler at the Enoch Pratt Free Library in Baltimore, Maryland.

[1] During World War II, from 1943 to 1945, St. John worked for the Army Medical Library as acting librarian and then assistant to the director.

Innovations like assembly-line book processing reduced costs, which funded expanded services like remedial reading programs.