Custer, SD is a city located in Custer County, South Dakota and has a land area of 516.16 square miles (1,336.85 km2). The water area for the city is 0.61 square miles or 1.58 km2. There is one unique zip code in Custer, South Dakota and it is 57730. The area code(s) for Custer is 605.
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