Presidential elections · 2000–2024
Boulder County, CO — Presidential Election Results (2000–2024)
In 2024, Boulder County, Colorado voted for Kamala D. Harris (Democratic) by D+55.8 — 150,149 Democratic to 40,758 Republican of 196,150 votes cast. From 2020 to 2024 it shifted 0.8 points toward Republicans. That makes it 44.8 points more Democratic than Colorado overall (D+11.0).
Data: MIT Election Data & Science Lab, Harvard Dataverse.
Margin by election, 2000–2024
Democratic minus Republican, in points of all votes cast — blue bars Democratic, red Republican.
Every election in Boulder County
| Year | Democratic | Republican | Other | Dem share | Rep share | Margin |
|---|---|---|---|---|---|---|
| 2024 | 150,149 | 40,758 | 5,243 | 76.5% | 20.8% | D+55.8 |
| 2020 | 159,089 | 42,501 | 4,521 | 77.2% | 20.6% | D+56.6 |
| 2016 | 132,334 | 41,396 | 14,412 | 70.3% | 22.0% | D+48.3 |
| 2012 | 125,091 | 49,981 | 4,427 | 69.7% | 27.8% | D+41.8 |
| 2008 | 124,159 | 44,904 | 2,700 | 72.3% | 26.1% | D+46.1 |
| 2004 | 105,564 | 51,586 | 2,107 | 66.3% | 32.4% | D+33.9 |
| 2000 | 69,983 | 50,873 | 18,770 | 50.1% | 36.4% | D+13.7 |
Boulder County presidential elections — FAQ
Who carried Boulder County in the 2024 presidential election?+
Kamala D. Harris (Democratic) carried Boulder County, Colorado in 2024 by D+55.8, with 196,150 votes cast. Data: MIT Election Data & Science Lab.
How did Boulder County shift between 2020 and 2024?+
Boulder County shifted 0.8 points toward Republicans between 2020 (D+56.6) and 2024 (D+55.8).
Is Boulder County more Democratic or Republican than Colorado overall?+
In 2024, Boulder County went D+55.8 while Colorado overall went D+11.0 — 44.8 points more Democratic than the state.
Where does this election data come from?+
County-level presidential returns (2000–2024) come from the MIT Election Data and Science Lab (MEDSL), published on the Harvard Dataverse. pumsdata is an independent product that makes the data easy to map and compare, and is not affiliated with MEDSL or Harvard.