Tarkio is a city located in Atchison County, in the state of Missouri (MO), United States. Nestled in the West North Central division of the Midwest region, it covers an area of 1.4 square miles (4.0 km²) and sits at an elevation of 940 ft. With a population of approximately 1,935 residents, Tarkio offers a peaceful, rural atmosphere.
The town's population is composed of about 51.47% males and 48.53% females, and it has a population density of 402.17 people per square mile (541.38/km²). Tarkio lies at a latitude of 40.44 and a longitude of -95.38, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (9.7%), followed by English (10.2%), German (23.2%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 64491.