Dauphin Island, AL is a city located in Mobile County, Alabama and has a land area of 6.28 square miles (16.27 km2). The water area for the city is 27.56 square miles or 71.38 km2. There is one unique zip code in Dauphin Island, Alabama and it is 36528. The area code(s) for Dauphin Island is 251.
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