Who's Your Neighbor? is a 1917 silent American propaganda and drama film directed by S. Rankin Drew. The film's plot focuses around reformers who pass a law to force prostitutes, including Hattie Fenshaw, out of the red light district. Fenshaw becomes Bryant Harding's mistress and lives in an apartment next door to a reformer, and continues to ply her trade. After Fenshaw becomes familiar with Harding, his son, daughter and the daughter's fiancé, the climax of the film occurs as the cast assembles at Fenshaw's apartment. Harding returns and a fight breaks out that results in the reformers' arrival and concludes with the presumption that Fenshaw returns to a place of "legalized vice". The drama was written by Willard Mack and was his first foray into screen dramas. The film proved controversial, but is noted as a great success. The film originally debuted on June 15, 1917, but it was rejected by the National Board of Review and was later approved after a revision, but the film continued to be labeled as an immoral production. The film is presumed to be lost.