St. Charles: Demographics & People
St. Charles's population stands at 32,854 people, in 13,161 households. Population grew 0.4% from 32,733 (2022) to 32,854 (2024). Median age 41.5 years. (1.3y older than DuPage County; 2.4y older than Illinois). Children under 18 are 20% of the population. Population is 75% White (non-Hispanic) and 12% Hispanic or Latino. The community is somewhat diverse (Simpson index 0.34). 67% of households are family-led. County is losing 16,484 residents per year (2022-2023). County health: 29% adult obesity, 10% smoke.
- 2.5 people per household.
- 33% non-family households (singles, roommates).
Population & Trend
Population grew 0.4% from 32,733 (2022) to 32,854 (2024) — close to the U.S. annual rate of ~0.6%/yr. Estimated 2026 population: ~32,975 (extrapolated at 0.2%/yr trend). Census Bureau Vintage estimate: 33,138.
| Census data vintage | 2024 |
|---|---|
| Population | 932,877 people |
| Annual growth rate · Population change | 0.4% |
| Annual growth rate · Population (2022) | 32,733 |
| Annual growth rate · Population (2024) | 32,854 |
| Annual growth rate · Population growing | Yes |
| Annual growth rate · Trend category | stable |
| Population | 32,854 people |
| Population Estimate | 33,138 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 41.5y is 2.6 years older than the U.S. median (38.9y). Children under 18 make up 20% — below the U.S. share of ~22%.
| Age Summary · Median age | 41.5 years (vs Illinois 39.1y) |
|---|---|
| Age Summary · Children Pct | 20.1% |
| Age Summary · Character | established |
| Population under 18 | 6,609 |
| Median age | 41.5 years (vs Illinois 39.1y) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Race, Ethnicity & Diversity
Of 32,854 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.34 (0 = single group, 1 = perfectly even distribution); this is read as somewhat diverse.
| White residents | 26,025 |
|---|---|
| Black residents | 1,002 |
| Asian residents | 1,581 |
| Hispanic or Latino residents | 3,903 |
| Diversity Index · Diversity index (Simpson) | 34.2% |
| Diversity Index · Diversity label | somewhat diverse |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 80.0% |
| Asian population | 4.9% |
| Black population | 2.9% |
| Hispanic or Latino population | 12.3% |
| White (non-Hispanic) population | 74.7% |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Ancestry
Self-reported ancestry from Census ACS — what residents report as their ethnic origin, separate from race. Counts can exceed population because people can list multiple ancestries.
Top (8)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 0.7% are foreign-born — below the U.S. average of 13.9%. 10% have naturalized to U.S. citizenship.
| Residents born in this state | 23,044 |
|---|---|
| Residents born in another state | 6,185 |
| Share born in this state | 70.1% |
| Share born in another state | 29.9% |
| Native-born U.S. citizens | 18.8% |
| Foreign-born residents | 0.7% |
| Naturalized citizens | 10.4% |
| Total foreign-born residents | 3,448 |
| From Europe | 1,288 |
| From Asia | 9 |
| From Africa | 1,011 |
| From Latin America | 44 |
Households & Family Composition
13,161 households. Averaging 2.5 people each — matches the U.S. average of 2.5. 67% are family households — near the U.S. share of ~65%. Of 8,846 families, 32% are married couples with children.
| Children under 18 | 6,652 |
|---|---|
| Total families | 8,846 |
| Married couples with children | 2,796 |
| Single-parent households | 331 |
| Average household size | 2.46 |
| Women who gave birth (past year) | 12.3% |
| Grandparents living with grandchildren | 108 |
| Grandparents responsible for grandchildren | 25 |
| Family households | 8,823 households |
| Households that are families | 67.0% |
| Total households | 13,161 households |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 15.2% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 16,484 residents per year on net (IRS migration data).
| Moved within the county (past year) | 15.2% |
|---|---|
| Migration · People moving in (annual) | 905,072 |
| Migration · People moving out (annual) | 921,556 |
| Migration · Net migration (in − out) | -16,484 |
| Migration · Year | 2022-2023 |
Sources: IRS SOI Migration 2021-2022 · Refreshed 2026-04-12
Disability
Census ACS measures self-reported functional limitations — vision, hearing, mobility, cognitive, self-care, or independent-living. The U.S. baseline disability rate is about 12–13%; rates trend higher with median age.
| Residents with a disability | 1,282 |
|---|---|
| Disability rate | 3.9% |
Group Quarters
Group quarters are non-household living arrangements counted by the Census — college dormitories, nursing homes, military barracks, group homes, correctional facilities, and similar institutional or shared housing. 390 residents live in group quarters (1.2% of population).
| Living in group quarters | 390 |
|---|
Other
| Congressional District · District | 8 |
|---|---|
| Congressional District · Formatted | IL-08 |
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 17,043 |
| Cdc Birth Rate · State Fips | 17 |
| Cdc Birth Rate · County Fips | 43 |
| Cdc Birth Rate · County | Du Page |
| Cdc Birth Rate · Birth Rate | 6.1% |
| Cdc Birth Rate · Lower Ci | 5.70 |
| Cdc Birth Rate · Upper Ci | 6.60 |
| Cdc Mortality · Fips | 17,043 |
| Cdc Mortality · County | DuPage County |
| Cdc Mortality · Urban Rural | Large fringe metro |
| Cdc Mortality · Total Deaths 2020 2023 | 27,137 |
| Cdc Vaccination · Fips | 17,043 |
| Cdc Vaccination · County | DuPage County |
| Cdc Vaccination · Dose1 Pop Pct | 85.9% |
| Cdc Vaccination · Series Complete Pct | 79.6% |
| Cdc Vaccination · Booster Pct | 62.0% |
| Cdc Vaccination · Population 2019 | 922,921 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 10 |
| Family Score · Schools | 20 |
| Family Score · Childcare Centers | 3 |
| Family Score · Children Pct | 20.1% |
| Family Score · Rating | excellent |
| Town Summary · Key Facts | population 32,854, stable, established, affluent, white collar |
| Town Summary · Population | 32,854 people |
| Town Summary · County | DuPage County |
Sources: Census place-to-CD118 crosswalk (place_fips) · federal dataset cascade