St. Clair, Illinois — Presidential Election Results
St. Clair, Illinois has voted Democratic in 7 of the last 7 presidential elections on record (2000–2024). In 2024, it was 3.1 pts more Rep. 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 | Al Gore | Democratic | 55,961 | 55.7% | 13.6 pts (13,662 votes) | 100,393 | — | 1.5 pts more Dem. |
| 2004 | John Kerry | Democratic | 62,410 | 55.1% | 10.8 pts (12,207 votes) | 113,189 | -3.1 pts | 0.4 pts more Dem. |
| 2008 | Barack Obama | Democratic | 76,160 | 60.6% | 22.4 pts (28,202 votes) | 125,744 | +11.9 pts | 2.7 pts more Rep. |
| 2012 | Barack Obama | Democratic | 67,285 | 56.3% | 14.4 pts (17,160 votes) | 119,466 | -8.1 pts | 2.5 pts more Rep. |
| 2016 | Hillary Clinton | Democratic | 60,756 | 50.4% | 5.7 pts (6,899 votes) | 120,580 | -8.6 pts | 12.0 pts more Rep. |
| 2020 | Joseph R Biden Jr | Democratic | 68,325 | 53.3% | 8.7 pts (11,175 votes) | 128,091 | +2.9 pts | 8.4 pts more Rep. |
| 2024 | Kamala D Harris | Democratic | 63,433 | 52.9% | 7.8 pts (9,412 votes) | 119,962 | -0.9 pts | 3.1 pts more Rep. |
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 | 256,462 | 39.1% of population |
| 2004 | 260,214 | 43.5% of population |
| 2008 | 266,518 | 47.2% of population |
| 2012 | 268,673 | 44.5% of population |
| 2016 | 263,187 | 45.8% of population |
| 2020 | 257,070 | 49.8% of population |
| 2024 | 251,149 | 47.8% of population |
Trend
Between 2000 and 2024, the two-party presidential margin in St. Clair shifted 5.9 points toward the Republican 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
St. Clair has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Illinois's own statewide winner in 7 of 7 (100%). Compare every county on the bellwether counties page.
Related Pages
Other Illinois Counties
Frequently Asked Questions
How has St. Clair voted in presidential elections since 2000?
Since 2000, St. Clair has voted Democratic in 7 of 7 recorded presidential elections and Republican in 0 of 7, based on county-level returns through 2024.
What was the closest presidential election in St. Clair?
St. Clair's closest recorded margin was in 2016, when Hillary Clinton (Democratic) won by 6.0 points (6,899 votes) out of 120,580 total votes cast.
Has St. Clair ever flipped between parties?
Not in the 2000-2024 record on this page -- St. Clair has voted for the same party in every recorded presidential election in that span.
What is the largest presidential election margin recorded in St. Clair?
The widest margin on record for St. Clair was in 2008, when Barack Obama (Democratic) won by 22.7 points.
How many votes were cast in St. Clair relative to its population?
In 2024, 119,962 votes were recorded in St. Clair against a total population of 251,149 (47.8% 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 St. Clair a presidential bellwether county?
St. Clair has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Illinois's own statewide winner in 7 of 7 (100%).