Mexican Population in Rock Island County, IL by City : 2025 Ranking & Insights

The Mexican population in Rock Island County, IL is recorded at 17,863 residents, based on the latest U.S. Census estimates. Each city in Rock Island County, IL has some Mexican population, but the county''s higher total suggests additional rural or non-municipal representation. The analysis below explores how Mexican communities are spread across Rock Island County, IL and comparable counties throughout Illinois.

Top 5 cities with the largest Mexican population in Rock Island County

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  • 1
    Moline
    Mexican population in Moline is 7,024
    16.63% of Moline population is Mexican
  • 2
    Rock Island
    Mexican population in Rock Island is 4,334
    11.79% of Rock Island population is Mexican
  • 3
    East Moline
    Mexican population in East Moline is 3,652
    17.53% of East Moline population is Mexican
  • 4
    Silvis
    Mexican population in Silvis is 874
    11.01% of Silvis population is Mexican
  • 5
    Milan
    Mexican population in Milan is 333
    6.61% of Milan population is Mexican

Overview of Mexican population in Rock Island County

  • Population Count and Percentage: American Community Survey data document Rock Island County with 17,863 Mexican residents (12.5% of 142,995 total county population), placing the jurisdiction at the 92nd percentile nationally among counties and 91st percentile within Illinois for Mexican population density, with demographic concentrations among the highest nationwide.
  • Comparison to State and National Averages: Census Bureau's ACS data documents Rock Island County's Mexican demographic representation of 12.5%, exceeding the national average of 11.3% while remaining below Illinois's elevated state average of 14.2%, placing the county above national concentration levels while below state demographic averages.
  • Share of Total State Population: Official American Community Survey data indicates Rock Island County contains 17,863 Mexican residents, representing less than 1% of Illinois's total Mexican population of 1.8 million.
  • Population Density per Square Mile: U.S. Census Bureau's American Community Survey shows Rock Island County maintains 41.8 Mexican Americans per square mile compared to Illinois's average of 32.5, indicating higher demographic concentration relative to state averages.
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12 Cities in Rock Island County Ranked by Mexican Population

View Methodology
ACS data [1] confirm Mexican populations in every incorporated city in the county, with the largest counts in Moline, Rock Island, East Moline, and Silvis. The table below provides detailed figures, including total population, density measures, and demographic distributions, based on the current ACS data for all 12 incorporated cities included in this analysis*.
cities in Rock Island County, IL ranked by Mexican population count
Rank by Mexican Population
City
Mexican Population
% of Total City Population
% of Total Rock Island County Mexican Population
5 Year Rank Trend
1 Moline 7,024 16.63% 39.32%
2 Rock Island 4,334 11.79% 24.26%
3 East Moline 3,652 17.53% 20.44%
4 Silvis 874 11.01% 4.89%
5 Milan 333 6.61% 1.86%
6 Carbon Cliff 313 13.92% 1.75%
7 Hampton 304 15.62% 1.70%
8 189 4.56% 1.06%
9 126 6.43% 0.71%
10 81 8.00% 0.45%
11 44 4.10% 0.25%
12 8 1.26% 0.04%
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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 city in Rock Island County, IL by their Mexican population, using the most recent ACS data available.

How the Census defines Mexican population

The U.S. Census Bureau allows people to self-identify their ancestry, meaning individuals can write upto ancestries when responding to the survey. In this ranking, we include everyone who identifies as having Mexican ancestry, whether alone or in combination with another ancestry.
Here are a few important things to know about how ancestry is reported:
  • Some people identify as Mexican alone, while others identify as Mexican along with another race (such as Mexican and German).
  • We’ve used the “Mexican alone or in any combination” category unless noted otherwise, which gives a broader picture of the Mexican population in each area.

How We Ranked the Data

This ranking is based on the total number of people who identified as Mexican alone or in combination in city. 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 Mexican .
  2. % of Total Rock Island County Mexican Population – This tells us how much of the entire U.S. Mexican 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 Mexican 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.
  • City that don’t have any reported Mexican 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 Mexican populations are most concentrated while keeping the numbers easy to understand.

Sources

  1. 2019-2023 5-Year Estimates.
  2. 2023.