† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupRomeovilleIllinoisUnited States
German12.6%16.1%12.5%
Irish9.9%10.6%9.4%
Polish8.0%6.0%2.2%
Italian6.6%5.4%4.8%
English4.1%6.9%9.5%
American1.9%3.3%5.3%
Swedish1.2%1.5%—
Dutch1.0%——
Mexican29.6%14.4%11.3%
Puerto Rican2.3%1.7%1.8%
Spaniard0.5%——
Cuban0.4%0.2%0.7%
Guatemalan0.4%0.3%0.5%
Colombian0.4%0.3%0.4%
Spanish0.4%——
African American†10.6%12.1%9.9%
African2.6%0.5%0.5%
Nigerian0.5%0.3%0.2%
Ghanaian0.2%——
Asian Indian3.0%2.1%1.4%
Filipino1.2%1.0%0.9%
Chinese0.7%1.0%1.3%
Pakistani0.5%0.3%—
Korean0.2%0.4%0.4%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Romeoville
Illinois
United States
Median age
35.5
39.1
39.1
Age 18–24
12.1%
9.1%
9.2%
Age 65 and older
11.6%
16.9%
17.2%
Household economy
Measure
Romeoville
Illinois
United States
Median household income
$106,325
$83,390
$84,427
Poverty rate
5.5%
11.8%
12.5%
Bachelor's degree or higher (25+)
28.3%
37.9%
35.6%
Languages at home
Measure
Romeoville
Illinois
United States
Speaks a non-English language at home
40.2%
24.1%
22.3%
Spanish
26.7%
14.0%
13.6%
Russian, Polish, or other Slavic
3.9%
2.5%
0.7%
Tagalog (incl. Filipino)
2.7%
0.7%
0.6%
Other languages
2.3%
0.6%
0.8%
Religious landscape
Measure
Romeoville
Illinois
United States
Catholic
—
24.2%
18.6%
Evangelical Protestant
—
11.7%
16.5%
Unclaimed / not counted
—
49.2%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Romeoville, Illinois
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+14.6%
2008
+32.4%
2012
+31.7%
2016
+28.8%
2020
+29.2%
2024
+16.8%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2004 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
57.2%Harris9,119
40.4%Trump6,443
2.4%
D+16.8
R+12.4
D+18.3
15,937
D
63.7%Biden10,783
34.5%Trump5,838
1.8%
D+29.2
D+0.4
D+24.8
16,930
D
61.3%Clinton8,933
32.5%Trump4,736
6.2%
D+28.8
R+2.9
D+26.7
14,567
D
65.0%Obama8,061
33.3%Romney4,127
1.8%
D+31.7
R+0.7
D+27.8
12,410
D
65.6%Obama8,556
33.2%McCain4,331
1.2%
D+32.4
D+17.8
D+25.1
13,050
D
56.7%Kerry6,256
42.0%Bush4,642
1.3%
D+14.6
—
D+17.1
11,041
Romeoville sits along the Des Plaines River corridor southwest of Chicago, where rapid population growth since the 1990s has created a diverse, working-class electorate that neither party consistently commands by more than a few points.
Across the recorded series it reached a Democratic high of 32.4 points in 2008. Between 2020 and 2024 the city moved 12.4 points toward the Republican candidate; the 2024 margin was 16.8 points.
A population of 41,152, a 43% non-Hispanic-white share, and a median household income of $106,325 describe the city. The city's voting pattern over the last decade is most similar to that of Streamwood and Hanover Park.
Akashic
Political twins — cities
The cities whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
In 2024, Romeoville, Illinois voted Democratic by 16.8 points (D+16.8), carried by the Democratic candidate. Out of 15,937 votes cast, 9,119 went Democratic and 6,443 went Republican.
How many people live in Romeoville, Illinois?
Romeoville, Illinois has a population of 41,152 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Romeoville, Illinois?
Median household income in Romeoville, Illinois is $106,325 — above the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Romeoville, Illinois?
Akashic tracks 6 presidential elections in Romeoville, Illinois from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
