A Study in Scarlet is an 1887 detective mystery novel by Arthur Conan Doyle, featuring the debut of Sherlock Holmes.

A Study in Scarlet may also refer to:

• A Study in Scarlet (1914 British film), a silent drama film directed by George Pearson, now considered lost
• A Study in Scarlet (1914 American film), a silent film directed by Francis Ford
• A Study in Scarlet (1933 film), starring Reginald Owen as Sherlock Holmes
• "A Study in Scarlet", a 1968 episode of the TV series Sherlock Holmes (1964-1968), starring Peter Cushing

• A Study in Scarlet Women, a 2016 mystery novel by Sherry Thomas, the first entry in the "Lady Sherlock series", in which Sherlock Holmes is actually a public persona created by a woman detective named Charlotte Holmes

This disambiguation page lists articles associated with the title A Study in Scarlet.
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