Smithville, OK is a city located in Mccurtain County, Oklahoma and has a land area of 231.58 square miles (599.79 km2). The water area for the city is 0.56 square miles or 1.45 km2. There is one unique zip code in Smithville, Oklahoma and it is 74957. The area code(s) for Smithville is 580/918.
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