Madcap may refer to:
People Madcap Moss, professional wrestler for WWE
Arts, media and entertainment
In comics Madcap (comics), a fictional character in the Marvel Universe
In film and video Madcap (project), an annotated video project of Xerox PARC
In music 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 Madcap Theater, a shortform improvisational comedy group
Business Madcap (restaurant), a contemporary Asian restaurant in San Anselmo, California
Technology Multicast Address Dynamic Client Allocation Protocol, MADCAP as defined by IETF RFC 2730
Vehicles Tamiya Madcap, 1/10 scale off-road buggy