Voting & Elections in Castle Rock, CO
Presidential election results and party lean trends
County-level data: Election results are reported at the county level. Castle Rock is located in Douglas County, CO. Results reflect all voters in the county, not just those in Castle Rock.
Election Overview
Source: Douglas County (2024)2024 Winner
Republican
Dem Votes
110,408
45.3%
GOP Votes
127,451
52.3%
Total Votes
243,758
Margin
R+7.0%
Shift from 2020
D+0.2pp
vs prior election
📊Election Results by Year
2016–2024📈Partisan Lean Trend
R+7.0%Election History
Source: County-Level Election Results| Year | Dem Votes | GOP Votes | Total | Dem % | GOP % | Margin |
|---|---|---|---|---|---|---|
| 2024 | 110,408 | 127,451 | 243,758 | 45.3% | 52.3% | R+7.0 |
| 2020 | 104,653 | 121,270 | 231,599 | 45.2% | 52.4% | R+7.2 |
| 2016 | 67,045 | 100,178 | 182,918 | 36.6% | 54.8% | R+18.1 |
In the 2024 presidential election, Douglas County recorded 243,758 total votes. Republicans won the county with 52.3% of the vote compared to 45.3% for Democrats, a margin of R+7.0%. Compared to 2020, the margin shifted D+0.2pp from the previous election. Since 2016, Douglas County has shifted 11.1 percentage points toward Democrats.