Middletown, RI is a city located in Newport County, Rhode Island and has a land area of 12.54 square miles (32.48 km2). The water area for the city is 1.53 square miles or 3.96 km2. There is one unique zip code in Middletown, Rhode Island and it is 02842. The area code(s) for Middletown is 401.
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