Humboldt, SD is a city located in Minnehaha County, South Dakota and has a land area of 85.85 square miles (222.35 km2). The water area for the city is 1.83 square miles or 4.74 km2. There is one unique zip code in Humboldt, South Dakota and it is 57035. The area code(s) for Humboldt is 605.
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