St. Charles is a city located in South Dakota. St. Charles has a 2020 population of 4. St. Charles is currently declining at a rate of 0.00% annually and its population has increased by since the most recent census, which recorded a population of in 2010. St. Charles reached it's highest population of 25 in 2013.
The average household income in St. Charles 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 St. Charles is 0 years, 0 years for males, and 0 years for females. For every 100 females there are 100.0 males.