Iduna may refer to:

• One of several modern anglicizations of the name of the Norse goddess Iðunn
• 176 Iduna, an asteroid named after the goddess
• Iduna (bird), a genus of tree warblers
• Iduna (literature society)
• Iduna, Wisconsin, an unincorporated community, United States
• Iduna language, spoken in Papua New Guinea
• The journal of the Swedish Geatish Society
• Iduna, a character from Disney's animated films of Frozen

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