† 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
GroupChathamIllinoisUnited States
German23.8%16.1%12.5%
English14.3%6.9%9.5%
Irish14.2%10.6%9.4%
American5.7%3.3%5.3%
Italian5.2%5.4%4.8%
Polish2.3%6.0%2.2%
Scottish2.2%—1.3%
French2.1%0.7%1.6%
Mexican1.7%14.4%11.3%
Puerto Rican0.7%1.7%1.8%
Honduran0.3%0.2%0.3%
Colombian0.3%0.3%0.4%
Asian Indian1.1%2.1%1.4%
Filipino0.7%1.0%0.9%
Chinese0.4%1.0%1.3%
African American†2.4%12.1%9.9%
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
Chatham
Illinois
United States
Median age
35.4
39.1
39.1
Age 18–24
6.8%
9.1%
9.2%
Age 65 and older
12.0%
16.9%
17.2%
Household economy
Measure
Chatham
Illinois
United States
Median household income
$106,773
$83,390
$84,427
Poverty rate
3.3%
11.8%
12.5%
Bachelor's degree or higher (25+)
53.2%
37.9%
35.6%
Languages at home
Measure
Chatham
Illinois
United States
Speaks a non-English language at home
5.7%
24.1%
22.3%
Spanish
1.0%
14.0%
13.6%
Other Indo-European
2.8%
2.6%
2.0%
Religious landscape
Measure
Chatham
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.
Chatham, Illinois
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
−31.9%
2008
−10.1%
2012
−24.5%
2016
−18.3%
2020
−11.4%
2024
−10.2%
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
R
43.5%Harris3,438
53.7%Trump4,247
2.9%
R+10.2
D+1.2
R+8.8
7,912
R
43.0%Biden3,427
54.4%Trump4,335
2.6%
R+11.4
D+6.9
R+15.8
7,968
R
36.6%Clinton2,617
54.9%Trump3,923
8.6%
R+18.3
D+6.2
R+20.4
7,152
R
36.7%Obama2,225
61.2%Romney3,706
2.1%
R+24.5
R+14.4
R+28.3
6,057
R
44.1%Obama2,719
54.2%McCain3,340
1.6%
R+10.1
D+21.8
R+17.4
6,160
R
33.9%Kerry2,057
65.9%Bush3,990
0.2%
R+31.9
—
R+29.4
6,059
Chatham sits just southeast of the state capital, drawing state-government households and working families whose shifting party preferences have made Sangamon County a bellwether for downstate Illinois.
Across the recorded series it reached a Republican high of 31.9 points in 2004. Between 2020 and 2024 the city moved 1.2 points toward the Democratic candidate; the 2024 margin was 10.2 points.
A population of 14,639, a 90% non-Hispanic-white share, and a median household income of $106,773 describe the city. The city's voting pattern over the last decade is most similar to that of Fort Mitchell and Monument.
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, Chatham, Illinois voted Republican by 10.2 points (R+10.2), carried by the Republican candidate. Out of 7,912 votes cast, 3,438 went Democratic and 4,247 went Republican.
How many people live in Chatham, Illinois?
Chatham, Illinois has a population of 14,639 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Chatham, Illinois?
Median household income in Chatham, Illinois is $106,773 — above the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Chatham, Illinois?
Akashic tracks 6 presidential elections in Chatham, Illinois from 2004 to 2024. Of those, 0 went Democratic and 6 went Republican.
