Polco gives each area an index from the public data behind it, adjusted for the community's socioeconomic profile. Higher is stronger by Polco's measure. Where this page has the numbers behind an area, pick it to see them.

Inclusivity and engagement57
Utilities52
Natural environment52
Parks and recreation42

Source: Polco GPAL, using data from the original source shown for each indicator. The area indexes are for 2025.

Data index

What each number actually means.

Pick a number to see how St. Charles compares with other communities, what Polco's model expected and what to keep in mind.

Where St. Charles ranks on population

71,508 in 2024

Compared with communities nationallyHigher · 97th percentile

Compared with communities in MissouriHigher · 99th percentile

Compared with communities of similar population sizeSimilar · 44th percentile

Each dot is St. Charles' percentile within that group, from Polco. Polco treats this measure as neither good nor bad, so further right only means higher.

Source: Polco GPAL, using data from U.S. Census Bureau American Community Survey. Polco’s name for this measure: “Total population”.

What it measures

2024 · Census ACS

How many people live in St. Charles. The number comes from the Census Bureau's American Community Survey, and college students who live there count as residents.

What Polco's model shows

Model estimate

Polco's model expected 71,506 for 2024; the measured figure was 71,508. Polco's GPAL model projects 71,973 for 2025.

Who it affects

More residents means more demand on housing, schools, roads and local services. Population also shapes how much state and federal money St. Charles receives.

Keep in mind

Survey figures are estimates with a margin of error. Small changes from one year to the next may not be meaningful.

About this data

These figures come from Polco's GPAL data, which brings together public data on U.S. cities and counties from sources like the Census Bureau, the CDC, the Bureau of Labor Statistics and the FBI. Each number is for the year shown with it, and most public data runs one to two years behind. Dollar figures are not adjusted for inflation.

The comparisons are Polco's. Each one names the group of communities St. Charles is compared with, and the percentile is St. Charles' place within that group. Polco's model figures are estimates, not measurements.

Polco has 221 measures for St. Charles. This page shows the 66 whose units and values could be checked, plus a few that Polco only has for St. Charles County. Polco data release of Oct 26, 2026.

Explore St. Charles on Polco →

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