One Week is a 1920 American two-reel silent comedy film starring Buster Keaton, the first independent film production he released on his own. The film was written and directed by Keaton and Edward F. Cline, and runs for 19 minutes. Sybil Seely co-stars. The film contains a large number of innovative visual gags largely pertaining to either the house or to ladders.

In 2008, One Week was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant".