Tarkio, MO is a city located in Atchison County, Missouri and has a land area of 115.53 square miles (299.22 km2). The water area for the city is 0.04 square miles or 0.10 km2. There is one unique zip code in Tarkio, Missouri and it is 64491. The area code(s) for Tarkio is 660.
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