Low Island may refer to:

• Low Island, British Columbia, Canada
• Low Island, Falkland Islands
• Low Island, Manitoba, Canada
• Low Island, Nova Scotia, Canada
• Low Island (Nunavut), Frobisher Bay, Canada
• Low Island (Nunavut), Milne Inlet, Canada
• Low Island, Kenora, Ontario, Canada
• Low Island, Manitoulin, Ontario, Canada
• Low Island (Queensland) also known as Low Isle, one of the Low Isles
• Low Island (South Shetland Islands)
• Low Island (Washington), one of the San Juan Islands
• Inishloe, County Clare, Ireland

A low island is, in geology (and sometimes in archaeology), an island of coral origin. The term applies whether the island was formed as a result of sedimentation upon a coral reef or of the uplifting of such islands. The term is used to distinguish such islands from high islands, whose origins are volcanic.