Madcap may refer to:
People edit
- Madcap Moss, professional wrestler for WWE
Arts, media and entertainment edit
In comics edit
- Madcap (comics), a fictional character in the Marvel Universe
In film and video edit
- Madcap (project), an annotated video project of Xerox PARC
In music edit
- The Madcaps, an Austrian band of the 1960s and 1970s
- The Madcap Laughs, an album by former Pink Floyd member Syd Barrett
- 'Madcap", a song by Polish gothic metal band Sirrah, from their album Did Tomorrow Come...
In theater edit
- Madcap Theater, a shortform improvisational comedy group
Technology edit
- Multicast Address Dynamic Client Allocation Protocol, MADCAP as defined by IETF RFC 2730
- MadCap Software, a software company
Vehicles edit
- Tamiya Madcap, 1/10 scale off-road buggy