St. Louis County, Missouri — Presidential Election Results
St. Louis County, Missouri has voted Democratic in 7 of the last 7 presidential elections on record (2000–2024). In 2024, it was 42.5 pts more Dem. than Missouri 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. Missouri |
|---|---|---|---|---|---|---|---|---|
| 2000 | Al Gore | Democratic | 250,631 | 51.5% | 5.3 pts (25,942 votes) | 486,884 | — | 8.9 pts more Dem. |
| 2004 | John Kerry | Democratic | 295,284 | 54.4% | 9.3 pts (50,315 votes) | 542,983 | +3.9 pts | 16.6 pts more Dem. |
| 2008 | Barack Obama | Democratic | 333,123 | 59.5% | 19.9 pts (111,418 votes) | 559,854 | +10.8 pts | 20.2 pts more Dem. |
| 2012 | Barack Obama | Democratic | 297,097 | 56.2% | 13.7 pts (72,355 votes) | 528,676 | -6.2 pts | 23.4 pts more Dem. |
| 2016 | Hillary Clinton | Democratic | 286,704 | 55.7% | 16.4 pts (84,270 votes) | 514,858 | +3.4 pts | 36.9 pts more Dem. |
| 2020 | Joseph R Biden Jr | Democratic | 328,151 | 61.2% | 24.0 pts (128,658 votes) | 536,446 | +7.2 pts | 40.1 pts more Dem. |
| 2024 | Kamala D Harris | Democratic | 305,635 | 60.8% | 23.4 pts (117,653 votes) | 502,738 | -0.5 pts | 42.5 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 | 1,016,178 | 47.9% of population |
| 2004 | 1,007,813 | 53.9% of population |
| 2008 | 998,331 | 56.1% of population |
| 2012 | 1,000,761 | 52.8% of population |
| 2016 | 997,837 | 51.6% of population |
| 2020 | 1,003,376 | 53.5% of population |
| 2024 | 992,929 | 50.6% of population |
Trend
Between 2000 and 2024, the two-party presidential margin in St. Louis County shifted 18.4 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
St. Louis County has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Missouri's own statewide winner in 0 of 7 (0%). Compare every county on the bellwether counties page.
Related Pages
Other Missouri Counties
Frequently Asked Questions
How has St. Louis County voted in presidential elections since 2000?
Since 2000, St. Louis County 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. Louis County?
St. Louis County's closest recorded margin was in 2000, when Al Gore (Democratic) won by 5.5 points (25,942 votes) out of 486,884 total votes cast.
Has St. Louis County ever flipped between parties?
Not in the 2000-2024 record on this page -- St. Louis County has voted for the same party in every recorded presidential election in that span.
What is the largest presidential election margin recorded in St. Louis County?
The widest margin on record for St. Louis County was in 2020, when Joseph R Biden Jr (Democratic) won by 24.4 points.
How many votes were cast in St. Louis County relative to its population?
In 2024, 502,738 votes were recorded in St. Louis County against a total population of 992,929 (50.6% 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. Louis County a presidential bellwether county?
St. Louis County has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Missouri's own statewide winner in 0 of 7 (0%).