Guernsey is a town in Platte County, Wyoming, United States. The population was 1,147 at the 2000 census. According to the United States Census Bureau, the town has a total area of 1.1square miles (2.8Square kilometers), of which, 1.1 squaremiles (2.8Square kilometers) of it is land and 0.92% is water. As of the census of 2000, there were 1,147 people, 504 households, and 312 families residing in the town. The population density was 1,067.3 people per square mile (413.9Square kilometers). There were 612 housing units at an average density of 569.5per square mile (220.8Square kilometers).