1. Arts, media and entertainment
    In comics  In film and video  In music  In theater 

2. Technology

3. Vehicles

Madcap may refer to:

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

• Madcap Mondays, a cultural phenomenon occurring at The Spot Underground in Providence, Rhode Island
• Madcap (band), a punk band
• 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

Technology

• Multicast Address Dynamic Client Allocation Protocol, MADCAP as defined by IETF {{IETF RFC|2730}}
• MadCap Software, a software company

Vehicles

• Tamiya Madcap, 1/10 scale off-road buggy

• Subanua
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• Subaponeurotic Hemorrhage
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• Subarctic Bluet
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