2025

Cities in St. Clair County, IL ranked by White Population

This list ranks the 38 cities in St. Clair County based on their White population, as estimated by the United States Census Bureau. It also highlights population changes in these cities over the past five years.
Updated Jan 24, 2025

Top 5 cities with the largest White population in St. Clair County

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  • 1
    Belleville
    White population in Belleville is 26,800
    59.49% of Belleville population is White
  • 2
    O'Fallon
    White population in O'Fallon is 26,158
    73.84% of O'Fallon population is White
  • 3
    Collinsville
    White population in Collinsville is 19,408
    37.60% of Collinsville population is White
  • 4
    Collinsville
    White population in Collinsville is 19,408
    37.60% of Collinsville population is White
  • 5
    Swansea
    White population in Swansea is 11,490
    72.91% of Swansea population is White

List of 38 cities in St. Clair County, IL by White Population

View Methodology
Rank by White Population
City
White Population
% of Total City Population
% of Total St. Clair County White Population
5 Year Rank Trend
1 Belleville 26,800 59.49% 17.09%
2 O'Fallon 26,158 73.84% 16.68%
3 Collinsville 19,408 37.60% 12.38%
3 Collinsville 19,408 37.60% 12.38%
4 Swansea 11,490 72.91% 7.33%
5 Columbia 10,774 47.17% 6.87%
5 Columbia 10,774 47.17% 6.87%
6 10,151 55.30% 6.47%
7 9,955 64.23% 6.35%
8 7,759 80.24% 4.95%
9 4,261 91.28% 2.72%
10 3,928 94.45% 2.51%
11 3,695 75.87% 2.36%
12 3,654 87.79% 2.33%
13 3,462 97.22% 2.21%
14 3,363 75.12% 2.15%
15 3,249 40.89% 2.07%
15 3,249 40.89% 2.07%
16 1,933 93.02% 1.23%
17 1,158 21.08% 0.74%
17 1,158 21.08% 0.74%
18 1,128 86.37% 0.72%
19 994 16.02% 0.63%
19 994 16.02% 0.63%
20 604 96.79% 0.39%
21 547 44.91% 0.35%
21 547 44.91% 0.35%
22 512 96.60% 0.33%
23 381 100.00% 0.24%
24 363 1.95% 0.23%
25 356 96.74% 0.23%
26 299 97.08% 0.19%
27 207 11.30% 0.13%
28 170 73.59% 0.11%
29 24 2.91% 0.02%

List of cities with no White Population in St. Clair County, IL

According to data from the United States Census Bureau, the following cities in St. Clair County have no recorded White population*:
  • Alorton
  • Cahokia
  • Centreville
* These cities were not included in the ranking above, as they do not meet the population criteria. It is possible that a small population exists but was not reported or captured due to limitations or variations in Census data collection and reporting.

Methodology

This ranking list is based on data from the American Community Survey (ACS) 5-Year Estimates, conducted by the U.S. Census Bureau. The ACS is one of the most reliable sources for understanding population trends across different locations, and it provides estimates for various racial and ethnic groups at city, county, state and all geography levels down to the Census block group.
This list ranks cities in St. Clair County, IL by their White population, using the most recent ACS data available.

How the Census Defines White Population

The U.S. Census Bureau allows people to self-identify their race, meaning individuals can choose one or more racial categories when responding to the survey. In this ranking, we include everyone who identifies as White, whether alone or in combination with another race.
Here are a few important things to know about how race is reported:
  • Some people identify as White alone, while others identify as White along with another race (such as White and White).
  • Hispanic / Latino origin is reported separately from race, so someone can be both Hispanic and White .
  • We’ve used the “White alone or in combination” category unless noted otherwise, which gives a broader picture of the White population in each area.

How We Ranked the Data

This ranking is based on the total number of people who identified as White alone or in combination in cities. To provide additional context, we’ve also included two key percentages:
  1. % of Total City Population – This shows what percentage of the total state population identifies as White .
  2. % of Total St. Clair County White Population – This tells us how much of the entire U.S. White population lives in that state.
To keep things simple, all population numbers have been rounded to the nearest whole number, and percentages are rounded to one decimal place. Because of rounding, some percentages may not add up to exactly 100%.

Things to Keep in Mind

Like all survey-based data, ACS estimates come with some limitations. Here are a few things to be aware of:
  • In places with very small White populations, the numbers may not be reported at all due to privacy protections or sampling variability in the survey.
  • Since the ACS is based on a sample, the numbers are estimates, not exact counts. That means they may slightly differ from other sources like the decennial U.S. Census.
  • Cities that don’t have any reported White population are not included in the ranking but are listed separately below for reference.
This ranking is meant to provide a clear, data-driven look at where White populations are most concentrated while keeping the numbers easy to understand.

Sources

U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.