Tarkio is a city located in Missouri. With a 2020 population of 1,422, it is the 288th largest city in Missouri and the 8917th largest city in the United States. Tarkio is currently declining at a rate of -0.56% annually and its population has decreased by -10.17% since the most recent census, which recorded a population of 1,583 in 2010. Tarkio reached it's highest population of 1,574 in 2010. Spanning over 1 miles, Tarkio has a population density of 1,025 people per square mile.
The average household income in Tarkio is $52,508 with a poverty rate of 14.44%. The median rental costs in recent years comes to $599 per month, and the median house value is $71,000. The median age in Tarkio is 44.1 years, 40.8 years for males, and 48.9 years for females. For every 100 females there are 107.9 males.