Onida, SD is a city located in Sully County, South Dakota and has a land area of 439.18 square miles (1,137.47 km2). The water area for the city is 3.16 square miles or 8.18 km2. There is one unique zip code in Onida, South Dakota and it is 57564. The area code(s) for Onida is 605.
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