† 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
GroupNorthbrookIllinoisUnited States
German17.0%16.1%12.5%
Irish15.9%10.6%9.4%
Polish13.2%6.0%2.2%
Italian9.1%5.4%4.8%
English6.8%6.9%9.5%
American4.2%3.3%5.3%
Swedish2.3%1.5%—
Russian1.9%——
Asian Indian4.9%2.1%1.4%
Chinese3.3%1.0%1.3%
Filipino2.9%1.0%0.9%
Korean1.4%0.4%0.4%
Pakistani0.8%0.3%—
Vietnamese0.6%0.2%0.6%
Japanese0.4%—0.2%
Mexican4.1%14.4%11.3%
Puerto Rican0.5%1.7%1.8%
African American†1.7%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
Northbrook
Illinois
United States
Median age
49.6
39.1
39.1
Age 18–24
5.1%
9.1%
9.2%
Age 65 and older
26.5%
16.9%
17.2%
Household economy
Measure
Northbrook
Illinois
United States
Median household income
$157,782
$83,390
$84,427
Poverty rate
4.3%
11.8%
12.5%
Bachelor's degree or higher (25+)
72.6%
37.9%
35.6%
Languages at home
Measure
Northbrook
Illinois
United States
Speaks a non-English language at home
25.8%
24.1%
22.3%
Russian, Polish, or other Slavic
8.0%
2.5%
0.7%
Other Indo-European
4.8%
2.6%
2.0%
Korean
4.2%
0.3%
0.3%
Chinese (incl. Mandarin & Cantonese)
2.7%
0.9%
1.1%
Religious landscape
Measure
Northbrook
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.
Northbrook, Illinois
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+11.4%
2008
+26.9%
2012
+12.7%
2016
+36.9%
2020
+38.5%
2024
+36.6%
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
67.8%Harris13,769
31.2%Trump6,341
0.9%
D+36.6
R+1.9
D+38.1
20,297
D
68.6%Biden15,140
30.1%Trump6,640
1.3%
D+38.5
D+1.7
D+34.1
22,061
D
65.2%Clinton12,738
28.3%Trump5,530
6.5%
D+36.9
D+24.2
D+34.8
19,545
D
55.6%Obama10,227
42.9%Romney7,895
1.5%
D+12.7
R+14.2
D+8.8
18,403
D
63.0%Obama12,054
36.1%McCain6,907
0.9%
D+26.9
D+15.5
D+19.6
19,142
D
55.3%Kerry10,658
43.9%Bush8,466
0.9%
D+11.4
—
D+13.8
19,290
Northbrook sits in Cook County's northern collar, where high educational attainment and household incomes above state medians have historically produced competitive margins in statewide races despite a predominantly suburban character.
Across the recorded series it reached a Democratic high of 38.5 points in 2020. Between 2020 and 2024 the city moved 1.9 points toward the Republican candidate; the 2024 margin was 36.6 points.
A population of 34,585, a 73% non-Hispanic-white share, and a median household income of $157,782 describe the city. The city's voting pattern over the last decade is most similar to that of Glenview and Wilmette.
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, Northbrook, Illinois voted Democratic by 36.6 points (D+36.6), carried by the Democratic candidate. Out of 20,297 votes cast, 13,769 went Democratic and 6,341 went Republican.
How many people live in Northbrook, Illinois?
Northbrook, Illinois has a population of 34,585 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Northbrook, Illinois?
Median household income in Northbrook, Illinois is $157,782 — above the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Northbrook, Illinois?
Akashic tracks 6 presidential elections in Northbrook, Illinois from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
