Alan Duffy may refer to:
- Alan Duffy (astronomer) (born 1983), astronomer and science communicator
- Alan Duffy (record label owner), founder of Imaginary Records
- Alan Duffy (footballer) (born 1949), footballer for Tranmere Rovers
- Alan Duffy, a character in Food Chain
- Alan Duffy, Argentine recording artist of British descent, best known as the lead vocalist of King รfrica dance music project
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