Welcome to the official website of Tarkio, Missouri! Tarkio is located at the intersection of U.S. Highway 59 and U.S. Highway 136 in Atchison County in far northwestern Missouri. We are a community of 1,583 people, proud of our heritage and small town way of life. Tarkio is home to the Tarkio College Campus, Heartland Recreational Center, and Tarkio R-1 School District. Please take a few minutes to browse our website!