Hay is a masculine given name and nickname. It may refer to:

• Hay Frederick Donaldson (1856-1916), Australia-born English mechanical engineer and British Army brigadier-general
• Hay MacDowall (died 1809), British Army lieutenant general, General Officer Commanding, Ceylon
• Hay Millar (1883-1944), Canadian ice hockey player
• Hay Petrie (1895-1948), Scottish actor
• Hay Plumb (1883-1960), English actor and film director born Edward Hay-Plumb
• Hay Wilson (died 1925), Anglican priest, Dean of Moray, Ross and Caithness

• Blaymont
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• Blayney- Demondrille railway line, New South Wales
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• Blayney Wind Farm, New South Wales
• Blayney–Demondrille railway line, New South Wales
• Blay Whitby
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• Blaz Bertoncelj and Andrea Podlogar
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