St. Charles Population

1860–2026

33,720

2026 projection

2% since 2020 (increase)

05K10K15K20K25K30K35K186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for St. Charles. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202633,720+1260.38%
202533,594+140.04%
202433,580+7072.15%
202332,873+480.15%
202232,825-2550.77%
202133,080+70.02%
202033,073+2080.63%
201932,865-490.15%
201832,914+3891.20%
201732,525-640.20%

Showing 10 of 31 years.

St. Charles Demographics

41.5median age

Median age

Female42.9 yrs
Male39.3 yrs

Adults

26,245
5,721 seniors · 22%20,524 other adults

Sex

Female 49.5% · 16,277Male 50.5% · 16,577

Population by age

MaleFemale85+ years, male: 12585+ years, female: 28480–84 years, male: 24580–84 years, female: 37775–79 years, male: 48475–79 years, female: 63070–74 years, male: 66870–74 years, female: 86965–69 years, male: 1,01065–69 years, female: 1,02960–64 years, male: 1,29860–64 years, female: 1,27355–59 years, male: 1,10155–59 years, female: 1,06250–54 years, male: 1,23850–54 years, female: 1,44345–49 years, male: 1,06845–49 years, female: 89240–44 years, male: 89340–44 years, female: 95535–39 years, male: 1,03635–39 years, female: 1,09530–34 years, male: 92130–34 years, female: 1,08625–29 years, male: 1,28325–29 years, female: 87120–24 years, male: 1,12220–24 years, female: 1,25215–19 years, male: 1,12115–19 years, female: 99310–14 years, male: 1,13010–14 years, female: 8235–9 years, male: 1,1355–9 years, female: 8030–4 years, male: 6990–4 years, female: 54085+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 329 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

St. Charles Income

$114,300median household income

Median household income

$114,300

Half of households earn more, half earn less

Median earnings

$61,879

Typical yearly pay for a worker 25 or older.

Poverty rate

4.5%

About 1 in 22 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

St. Charles Marital Status

53% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married53%55%52%
Never married31%34%28%
Divorced10%8%12%
Widowed5%2%7%
Separated<1%<1%1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

10 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year