Calio is a city located in North Dakota. With a 2020 population of 18, it is the 338th largest city in North Dakota and the 19409th largest city in the United States . Calio is currently declining at a rate of -5.26% annually and its population has decreased by -18.18% since the most recent census, which recorded a population of 22 in 2010. Calio reached it's highest population of 22 in 2010. Spanning over 9 miles, Calio has a population density of 2 people per square mile.
The average household income in Calio is - with a poverty rate of 0.00%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Calio is 0 years, 0 years for males, and 0 years for females.