The total population of St. Charles is estimated to be 272 with 144 males (52.94%) and 128 females (47.06%). There are 16 less females than males in St. Charles.
In 2022, the population of St. Charles was 276, a 0.73% increase year-by-year from 2021. Previously, in 2021, St. Charles's population was 274, a decline of 0.00% compared to a population of 274 in 2020.
The median age in St. Charles, KY is 38.3, as per 2021 ACS 5-Year Estimates. Of the total population, 27.68% were under the age of 15, 11.07% aged 15 to 29, 46.49% aged 30 to 64, 13.28% aged 65 to 84, and 1.48% were 85 years of age and older.