St. John's Island or St. John Island may refer to:
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Saint John, U.S. Virgin Islands, an island of the U.S. Virgin Islands
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Saint John's Island, Singapore
* St. John's Island, Canada, former name of
Prince Edward Island to 1798
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St. John's Island, Egypt
Zabargad Island ( arz, جزيرة الزبرجد ', also known as St. John's Island in English) is the largest of a group of islands in Foul Bay, Egypt. It covers an area of . It is not a quaternary volcanic island, but rather is believed to be an ...
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Shangchuan Island or Saint John Island, China, originally from São João ("Saint John" in Portuguese)
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St. Ivan Island, in Bulgaria (''Ivan'' is the Bulgarian name corresponding to ''John'')
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