The Woman on the Index is a lost^[1] 1919 American silent drama film directed by Hobart Henley and starring Pauline Frederick and her then husband playwright Willard Mack. It was Frederick's first film at Goldwyn Pictures after coming over from Paramount. It is based on a 1918 Broadway play, The Woman on the Index, that starred Julia Dean.^[2][3][4]

As described in a film magazine,^[5] Sylvia Martin's (Frederick) past is that of despair. Turned out of an unhappy home, she becomes the wife of a handsome and manly type of crook. However, before the marriage can be consummated, he kills himself to avoid arrest. Sylvia is put on trial for murder and acquitted, but her name is recorded in a police index that falls into the hands of Hugo Declasse (Mack), an astute agent of the Bolsheviki. He pursues the wife, but she is also compelled to lend herself to the schemes of a secret service officer. She through her cleverness obtains documents held in the rooms of Declasse. In the end, she is returned to the arms of a forgiving and adoring husband.

• Pauline Frederick as Sylvia Martin
• Wyndham Standing as David Maber
• Willard Mack as Hugo Declasse
• Ben Hendricks Sr. as John Alden (*as Ben Hendricks)
• Jere Austin as Louis Gordon
• Louis Stern as John Martin
• Francis Joyner as Butler (as Frank Joyner)
• Florence Ashbrooke as Mother Fralonz
• Florida Kingsley as Mrs. Martin