
St Charles
- County:
- Kane County
- County Seat:
- No
- Area (mi²):
- 14.459
- State:
- Illinois
St. Charles is a city located in Kane County, Illinois. St. Charles has a 2025 population of 32,400. St. Charles is currently declining at a rate of -0.39% annually and its population has decreased by -1.92% since the most recent census, which recorded a population of 33,034 in 2020.
The average household income in St. Charles is $146,141 with a poverty rate of 3.89%. The median age in St. Charles is 41.6 years: 38.7 years for males, and 43.9 years for females.