Boulder, Colorado — Presidential Election Results
Boulder, Colorado has voted Democratic in 7 of the last 7 presidential elections on record (2000–2024). In 2024, it was 46.0 pts more Dem. than Colorado 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. Colorado |
|---|---|---|---|---|---|---|---|---|
| 2000 | Al Gore | Democratic | 69,983 | 50.1% | 13.7 pts (19,110 votes) | 139,626 | — | 24.8 pts more Dem. |
| 2004 | John Kerry | Democratic | 105,564 | 66.3% | 33.9 pts (53,978 votes) | 159,257 | +18.5 pts | 39.1 pts more Dem. |
| 2008 | Barack Obama | Democratic | 124,159 | 72.3% | 46.1 pts (79,255 votes) | 171,763 | +12.5 pts | 37.8 pts more Dem. |
| 2012 | Barack Obama | Democratic | 125,091 | 69.7% | 41.8 pts (75,110 votes) | 179,499 | -4.0 pts | 37.4 pts more Dem. |
| 2016 | Hillary Clinton | Democratic | 132,334 | 70.3% | 48.3 pts (90,938 votes) | 188,142 | +9.4 pts | 47.0 pts more Dem. |
| 2020 | Joseph R Biden Jr | Democratic | 159,089 | 77.2% | 56.6 pts (116,588 votes) | 206,111 | +5.5 pts | 44.0 pts more Dem. |
| 2024 | Kamala D Harris | Democratic | 150,149 | 76.5% | 55.8 pts (109,391 votes) | 196,150 | -0.5 pts | 46.0 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 | 271,574 | 51.4% of population |
| 2004 | 279,728 | 56.9% of population |
| 2008 | 290,859 | 59.1% of population |
| 2012 | 304,570 | 58.9% of population |
| 2016 | 321,250 | 58.6% of population |
| 2020 | 330,953 | 62.3% of population |
| 2024 | 330,262 | 59.4% of population |
Trend
Between 2000 and 2024, the two-party presidential margin in Boulder shifted 41.5 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
Boulder has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Colorado's own statewide winner in 5 of 7 (71%). Compare every county on the bellwether counties page.
Related Pages
Other Colorado Counties
Frequently Asked Questions
How has Boulder voted in presidential elections since 2000?
Since 2000, Boulder 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 Boulder?
Boulder's closest recorded margin was in 2000, when Al Gore (Democratic) won by 15.8 points (19,110 votes) out of 139,626 total votes cast.
Has Boulder ever flipped between parties?
Not in the 2000-2024 record on this page -- Boulder has voted for the same party in every recorded presidential election in that span.
What is the largest presidential election margin recorded in Boulder?
The widest margin on record for Boulder was in 2020, when Joseph R Biden Jr (Democratic) won by 57.8 points.
How many votes were cast in Boulder relative to its population?
In 2024, 196,150 votes were recorded in Boulder against a total population of 330,262 (59.4% 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 Boulder a presidential bellwether county?
Boulder has matched the national popular winner in 3 of the last 7 presidential elections (43%), and Colorado's own statewide winner in 5 of 7 (71%).