Agger may refer to:

• Agger (surname)
• Agger (ancient Rome), a type of ancient Roman rampart or embankment
• Agger (river), a river in North Rhine-Westphalia, Germany
• Agger nasi, an anatomical feature of the nose
• Agger Rockshelter, in Wisconsin, United States
• Agger, Denmark, a village in Jutland, Denmark
• Agger Tange, a small peninsula in Jutland, Denmark
• Agger Valley Railway (disambiguation)
• Cranopsis agger, a species of sea snail

This disambiguation page lists articles associated with the title Agger.
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