What is the population of St. Charles city?

St. Charles city has 32,733 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #57 of 1,462 in Illinois.

What is the median household income in St. Charles city?

Median household income in St. Charles city is $115,350 a year, 46.9% above the national figure of $78,538.

How much does it cost to rent or buy in St. Charles city?

Median gross rent is $1,788 a month and the median home value is $369,700, so rent absorbs about 18.6% of median household income.

Is St. Charles city affordable compared with the rest of the US?

Homes cost about 3.2× the local median income here versus roughly 3.9× nationally, so St. Charles city is more affordable to buy in than the typical US market, and rent takes 18.6% of median income against the 30% cost-burden line.

Aerial view of a dense city center, illustrating the US cities ZIP code directory

Illinois · Census place 66703

St. Charles, IL population, income and ZIP codes

Quick answer

The population of the city of St. Charles, Illinois (St. Charles, IL — Census place “St. Charles city”) is 32,733 residents, ranking #57 of 1462 places in Illinois. Median household income is $115,350, the median home is worth $369,700 and median gross rent runs $1,788 a month. Looking for the St. Charles Illinois ZIP code list? 2 ZIP codes serve St. Charles, IL: 60174, 60175.

Population: 32,733St. Charles city residents
Median household income: $115,350Past 12 months, inflation adjusted
Median home value: $369,700Owner-occupied units
Median gross rent: $1,788Rent plus utilities, monthly
Median age: 41.6 yrsAll residents
Homeownership rate: 70.3%Owner-occupied households

St. Charles ZIP codes (Illinois)

Census ZCTAs whose delivery area overlaps St. Charles.

The St. Charles IL ZIP code list below covers 2 ZIP codes. Open any one for its population, income, housing and rent profile.

What the numbers mean in St. Charles city

Housing cost measured against local earnings.

A household earning the St. Charles city median would spend about 18.6% of gross income on the median rent. The 30% mark is the federal threshold for cost burden, so anything above it signals a stretched rental market. The median home costs 3.2× the median household income; nationally that ratio sits near 4.5×. Poverty affects 3.9% of residents and 70.3% of households own their home.

Source: US Census Bureau, ACS 2019-2023 5-year estimates · rates as published for 2019-2023 ACS 5-year

St. Charles city, IL in context

How this area compares with national benchmarks.

St. Charles city is a small city in Illinois, with 32,733 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #57 of 1,462 ranked by population — larger than 96% of them. The median age here is 41.6 years against 39.1 nationally, a slightly older profile than the country as a whole. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.

Households in St. Charles city earn a median of $115,350 a year, 46.9% above the national figure of $78,538 and 55% above the $74,244 median for the 698 Illinois cities we cover. This figure covers the household, not the worker: two people on ordinary wages at one address outrank a single professional in the same table. Poverty reaches 3.9% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in St. Charles city is valued at $369,700, 21.9% above the national figure and 106% above the $179,100 peer median, while median gross rent runs $1,788 a month, 27.2% above the national figure, or roughly $21,456 across a full year. A household on the local median income would put about 18.6% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is cheap relative to what people here earn. The home-price-to-income ratio works out to 3.2×, against roughly 3.9× nationally, so buying is easier here than in the average US market. 70.3% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

No figure on this page is estimated by us; each one comes straight from the published ACS tables for this area. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.

Compare with nearby places

Places of similar size in Illinois.

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Frequently asked questions

Common questions about this area.

What is the population of St. Charles city?: St. Charles city has 32,733 residents on Census ACS 2019-2023 ACS 5-year estimates, ranking #57 of 1,462 in Illinois.
What is the median household income in St. Charles city?: Median household income in St. Charles city is $115,350 a year, 46.9% above the national figure of $78,538.
How much does it cost to rent or buy in St. Charles city?: Median gross rent is $1,788 a month and the median home value is $369,700, so rent absorbs about 18.6% of median household income.
Is St. Charles city affordable compared with the rest of the US?: Homes cost about 3.2× the local median income here versus roughly 3.9× nationally, so St. Charles city is more affordable to buy in than the typical US market, and rent takes 18.6% of median income against the 30% cost-burden line.
How current is this St. Charles city data?: All figures come from the US Census Bureau American Community Survey 2019-2023 ACS 5-year five-year estimates. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.