| image = Pauline Frederick 1918.jpg | image_size = | alt = | caption = | birth_name = Pauline Beatrice Libbey | birth_date = Boston, Massachusetts, U.S. | death_date = September 19, 1938 (aged 55) | death_place = Beverly Hills, California | death_cause = Asthma attack | resting_place = Grand View Memorial Park Cemetery | nationality = American | education = Miss Blachard's Finishing School | occupation = Actress | years_active = 1902–1937 | spouse = Frank Mills Andrews (m. 1909–13)
Willard Mack (m. 1917–20)
Dr. C.A. Rutherford (m. 1922–25)
Hugh C. Leighton (m. 1930–30)
Co. Joseph A. Marmon (m. 1934–34) }}
Pauline Frederick (August 12, 1883 – September 19, 1938) was an American stage and film actress.
Frederick was born Pauline Beatrice Libbey (later changed to Libby) in Boston in 1883 (some sources state 1884 or 1885), the only child of Richard O. and Loretta C. Libbey. Her father worked as a yardmaster for the Old Colony Railroad before becoming a salesman. Her parents separated when she was toddler and Fredrick was raised primarily by her mother to whom she remained close for the remainder of her life (her parents divorced around 1897). As a girl, she was fascinated with show business, and determined early to place her goals in the direction of the theater. She studied acting, singing and dancing at Miss Blachard's Finishing School in Boston where she later graduated.
Her father, however, discouraged her ambitions to be an actress and encouraged her to become an elocution teacher. After pursuing a career as an actress, her father disinherited her (he died in 1922). Due to her father's attitude towards her acting career, Pauline adopted the surname "Frederick" as her stage name. She legally changed her name to Pauline Frederick in 1908.