Mashup may refer to:
- Mashup (digital), a digital media file containing any or all of text, graphics, audio, video, and animation, which recombines and modifies existing digital works to create a derivative work
- Mashup (music), the musical genre encompassing songs which consist entirely of parts of other songs
- Mashup (video), a video that is edited from more than one source to appear as one
- Mashup (book), a book which combines a pre-existing text, often a classic work of fiction, with a certain popular genre such as vampire or zombie narratives
- Mashup (web application hybrid), a web application that combines data and/or functionality from more than one source
- Mash-Up (Glee), an episode of the American television series Glee
- Lotus Mashups, a Business Mashups editor developed and distributed by IBM as part of the IBM Mashup Center system
- MashUp, a Rockford, Illinois-based restaurant, founded in 2011, that focuses on creating comfort foods with a gourmet twist
- Band Mashups, the former name of the video game Battle of the Bands