Michael Fay is the name of:

• J. Michael Fay (born 1956), explorer and biologist
• Sir Michael Fay (banker) (born 1949), New Zealand merchant banker in the America Cup's Hall of Fame
• Michael D. Fay, American war artist
• Michael Francis Fay, British botanist
• Michael P. Fay (born 1975), American teenager caned in Singapore in 1994 for vandalism

• Allium contortum
• Allium convallarifolium
• Allium coppoleri
• Allium cordifolium
• Allium corsicum
• Allium coryi
• Allium crenulatum
• Allium cupani
• Allium curtum
• Allium cusickii
• Allium cuspidatum
• Allium cuthbertii
• Allium cyathophorum
• Allium cydni
• Allium cyrilli
• Allium czelghauricum
• Allium daninianum
• Allium dauricum
• Allium decaisnei
• Allium decipiens
• Allium deflexum
• Allium delicatulum
• Allium deltoidefistulosum
• Allium dentigerum
• Allium deserticola