Kennebec, SD is a city located in Lyman County, South Dakota and has a land area of 252.04 square miles (652.78 km2). The water area for the city is 2.20 square miles or 5.70 km2. There is one unique zip code in Kennebec, South Dakota and it is 57544. The area code(s) for Kennebec is 605.
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