Guernsey, WY is a city located in Platte County, Wyoming and has a land area of 75.12 square miles (194.56 km2). The water area for the city is 1.67 square miles or 4.33 km2. There is one unique zip code in Guernsey, Wyoming and it is 82214. The area code(s) for Guernsey is 307.
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