Coign may refer to:

• Quoin (architecture), masonry blocks at the corner of a wall
• Coign and livery, military exactions in Gaelic Ireland

• The Mark (2012 film)
• The Marked Woman
• The Marked Woman (disambiguation)
• The Market
• The Market: A Farm Fresh Supermarket
• The Market Cross
• The Marketing of Madness: Are We All Insane?
• The marketing of war
• The Market NYC
• The Market of Souls
• The Market of Vain Desire
• The Market Place
• The MarketPlace
• The MarketPlace Limited
• The MarketPlace Ltd.
• The Marketplace series
• The Market Revolution
• The Market Shopping Centre
• The Market Weighton School
• The Mark (film)
• The Mark Hotel
• The Mark Inside (book)
• The Markle Foundation
• The Mark (New York)
• The Mark of Athena