Rock Island may refer to:

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Islands in the United States

• Rock Island (Arizona)
• Rock Island (Massachusetts)
• Rock Island (Oregon)
• Rock Island (Rhode Island)
• Rock Island (Wisconsin)
• * Rock Island State Park (Wisconsin)

Communities in the United States

• Rock Island, Florida
• Rock Island, Illinois
• * the Rock Island Arsenal
• Rock Island, Oklahoma
• Rock Island, Tennessee
• Rock Island, Washington

Islands in Canada

• Rock Islands (Lake Nipissing) in Lake Nipissing, Ontario

Communities in Canada

• Rock Island, Quebec, a community within the town of Stanstead

Elsewhere

• Rock Islands (Palau)
• Rock Island (Trinidad and Tobago)

Other

• Chicago, Rock Island and Pacific Railroad, a railway company, known as the Rock Island Line
• Rock Island (album), by the band Jethro Tull
• Rock Island Line, a blues/folk song by Leadbelly
• "Rock Island", a song from the musical The Music Man