Dupage, Illinois — Presidential Election Results
Dupage, Illinois has voted Democratic in 5 of the last 7 presidential elections on record (2000–2024). It most recently flipped to Democratic in 2008. In 2024, it was 2.4 pts more Dem. than Illinois overall.
Jump to year: 2000 · 2004 · 2008 · 2012 · 2016 · 2020 · 2024
Full Election History, 2000–2024
| Year | Winner | Party | Votes | Vote Share | Margin | Total Votes Cast | Swing | Vs. Illinois |
|---|---|---|---|---|---|---|---|---|
| 2000 | George W. Bush | Republican | 201,037 | 55.2% | 13.3 pts (48,487 votes) | 364,362 | — | 26.1 pts more Rep. |
| 2004 | George W. Bush | Republican | 218,902 | 54.4% | 9.6 pts (38,805 votes) | 402,446 | +4.0 pts | 20.1 pts more Rep. |
| 2008 | Barack Obama | Democratic | 228,698 | 54.7% | 10.8 pts (45,072 votes) | 417,973 | +20.7 pts | 14.5 pts more Rep. |
| 2012 | Barack Obama | Democratic | 199,460 | 49.7% | 1.1 pts (4,414 votes) | 401,079 | -9.8 pts | 16.0 pts more Rep. |
| 2016 | Hillary Clinton | Democratic | 228,622 | 53.3% | 14.5 pts (62,207 votes) | 428,769 | +14.6 pts | 2.3 pts more Rep. |
| 2020 | Joseph R Biden Jr | Democratic | 281,222 | 58.0% | 18.1 pts (87,611 votes) | 485,104 | +2.7 pts | 1.1 pts more Dem. |
| 2024 | Kamala D Harris | Democratic | 251,164 | 55.0% | 13.1 pts (59,921 votes) | 456,882 | -4.9 pts | 2.4 pts more Dem. |
Population Context
Total Census Bureau population estimate for the county that year, and recorded votes as a share of that total population. This is a population-based figure, not a turnout rate against eligible or registered voters, which this site does not calculate.
| Year | County Population | Votes Cast (% of Population) |
|---|---|---|
| 2000 | 906,284 | 40.2% of population |
| 2004 | 913,940 | 44.0% of population |
| 2008 | 909,798 | 45.9% of population |
| 2012 | 928,666 | 43.2% of population |
| 2016 | 931,256 | 46.0% of population |
| 2020 | 931,508 | 52.1% of population |
| 2024 | 937,142 | 48.8% of population |
Trend
Between 2000 and 2024, the two-party presidential margin in Dupage shifted 27.3 points toward the Democratic candidate, based on recorded county returns. This reflects the vote totals in this dataset only; no claim is made here about the causes of that shift.
Margin Over Time
Democratic candidate's margin (percentage points, two-party vote share). Positive values favor the Democratic candidate; negative values favor the Republican candidate.
Bellwether Status
Dupage has matched the national popular winner in 5 of the last 7 presidential elections (71%), and Illinois's own statewide winner in 5 of 7 (71%). Compare every county on the bellwether counties page.
Related Pages
Other Illinois Counties
Frequently Asked Questions
How has Dupage voted in presidential elections since 2000?
Since 2000, Dupage has voted Democratic in 5 of 7 recorded presidential elections and Republican in 2 of 7, based on county-level returns through 2024.
What was the closest presidential election in Dupage?
Dupage's closest recorded margin was in 2012, when Barack Obama (Democratic) won by 1.1 points (4,414 votes) out of 401,079 total votes cast.
Has Dupage ever flipped between parties?
Yes. Dupage changed which party won the county in: 2008, based on the 2000-2024 record on this page.
What is the largest presidential election margin recorded in Dupage?
The widest margin on record for Dupage was in 2020, when Joseph R Biden Jr (Democratic) won by 18.5 points.
How many votes were cast in Dupage relative to its population?
In 2024, 456,882 votes were recorded in Dupage against a total population of 937,142 (48.8% of the total population). This is a population-based figure, not a turnout rate against eligible or registered voters, which this site does not calculate.
Is Dupage a presidential bellwether county?
Dupage has matched the national popular winner in 5 of the last 7 presidential elections (71%), and Illinois's own statewide winner in 5 of 7 (71%).