Alliage may refer to:

• Alloy (alliage in French), a mixture or metallic solid solution composed of two or more elements
• Alliage (band), a French boy band from 1996 to 2000
• Alliage (film), 1985 film directed by André Almuró
• Alliage (culture, science, technique), journal founded and directed by Jean-Marc Lévy-Leblond
• "Alliage", brand of wine by Byington Vineyard
• Alliage, 1960 electronic music by Jan Boerman

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