Maiden Castle or the Maiden's Castle may refer to:

Maiden derives from the Celtic Mai Dun which means 'great hill'.

• Maiden Castle, Cheshire, an Iron Age hill fort
• Maiden Castle, Cumbria, a Roman fortlet
• Maiden Castle, Dorset, an Iron Age hill fort
• Maiden Castle, Durham, an Iron Age promontory fort
• Maiden Castle, North Yorkshire, an Iron Age settlement

• Maiden Castle (Antarctica), in the Allan Hills
• Maiden Castle (Iran), an alternative name for Ghal'eh Dokhtar in Iran
• Maiden Castle (novel), 1936 novel by English writer John Cowper Powys
• Maiden Castle sports centre, university sports complex in Durham, England

• Maiden (disambiguation)
• Castle of the Maidens (Latin: Castellum Puellarum), an alternative name for Edinburgh Castle in Scotland
• Mai-Dun, a symphonic rhapsody of 1921 by composer John Ireland

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