Altonah, UT is a city located in Duchesne County, Utah and has a land area of 38.15 square miles (98.81 km2). The water area for the city is 0.01 square miles or 0.03 km2. There is one unique zip code in Altonah, Utah and it is 84002. The area code(s) for Altonah is 435.
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