Swan Island may refer to:

• Little Swan Island, Tasmania
• Swan Island (Tasmania)
• Swan Island (Victoria)

• Swan Islands, Falkland Islands
• Weddell Island, formerly Swan Island

• Swan Island, London
• Swan Island, Surrey
• Swan Island, County Down, a townland in County Down, Northern Ireland
• Swan Island, County Antrim, a townland in County Antrim, Northern Ireland

• Swan Island (Alaska)
• Swan Island (Chesapeake Bay), Chesapeake Bay
• Swan Island (Oregon)
• Swan Island Site, Illinois, an archaeological site
• Swan Island (Michigan)

• Swan Islands, Honduras
• Swan Islands, Karkinit Bay, Ukraine, off the northwestern Crimean coast

• Swan Island (band), a rock band from Portland, Oregon
• Swan Island Airport, Swan Island, Portland
• Swan Island Shipyard, Swan Island, Portland

• Swan's Island, Maine
• Little Swan Island hutia, an extinct species of rodent
• Île des Cygnes (disambiguation), French for Swan Island or Island of Swans