The name Washington Island refers to:

• Washington Island (Wisconsin), the largest of the islands that make up the Town of Washington in Door County, Wisconsin
• Washington Island (Michigan) in Keweenaw County, Michigan
• Washington Island (Minnesota) in Lake County, Minnesota
• Washington Island (New York) in Jefferson County, New York
• Teraina, also known as Washington Island, Kiribati
• Washington Islands Wilderness in Washington state
• An 18th-century name for Ua Huka, later extended as the "Washington Islands" to include all of the northern Marquesas Islands