High Island may refer to:

• High Island (Alaska), USA
• High Island, Texas, USA, a community
• High Island (Michigan), USA
• High Island (New York), USA
• High Island, Hong Kong (Leung Shuen Wan, 糧船灣洲), Sai Kung District, New Territories
• High Island (Queensland), Australia
• High Island (Maryland), an island in Maryland, USA
• High Island (Rhode River), an island in Maryland, USA
• High Island in Torres Strait, Queensland, Australia
• High Island, one of the Thimble Islands in Connecticut, USA
• Ardoileán or High Island, Ireland
• East Wallabi Island, usually referred to as "High Island" in the context of the Batavia shipwreck

In geology (and sometimes in archaeology), a high island is an island of volcanic origin. The term can be used to distinguish such islands from low islands, whose origin is due to sedimentation or uplifting of coral reefs (which have often formed on sunken volcanos).