St. Charles is a city located in Idaho. With a 2020 population of 160, it is the 179th largest city in Idaho and the 17293rd largest city in the United States. St. Charles is currently growing at a rate of 2.56% annually and its population has increased by 22.14% since the most recent census, which recorded a population of 131 in 2010. Spanning over 1 miles, St. Charles has a population density of 229 people per square mile.
The average household income in St. Charles is $82,879 with a poverty rate of 3.88%. The median rental costs in recent years comes to - per month, and the median house value is $187,500. The median age in St. Charles is 36.4 years, 36.5 years for males, and 35 years for females. For every 100 females there are 79.2 males.