Douglas County primary results show slight opening for Democrats

John Hickenlooper ran stronger in Douglas County than he did statewide in the July 2 primary, a small but notable sign in one of Colorado’s most reliable suburban battlegrounds. The county’s results suggested Democrats can still find room to improve here, even as Douglas remains a Republican-leaning base.

Douglas County’s voter profile helps explain why that matters. The U.S. Census Bureau estimates the county’s population reached 399,396 on July 1, 2025, up 11.6% from the 2020 census base of 357,993. It is wealthy, with a median household income of $149,594 in 2020-2024 data, highly educated, with 62.0% of adults age 25 and older holding at least a bachelor’s degree, and heavily suburban, with a 77.4% owner-occupied housing rate.

That mix has made Douglas County a key test case for both parties in statewide races. In 2024, Donald Trump beat Kamala Harris there by just under 7 points, far narrower than Mitt Romney’s 25-point win over Barack Obama in 2012. The same pattern showed up in down-ballot contests: Lauren Boebert won the county by roughly half a point in 2024, while Cory Gardner beat Democrat Brandon Shaffer by 31 points in 2012. The Colorado Sun has also reported that the share and number of registered Republicans in Douglas County have fallen steadily since 2012 as unaffiliated registration has grown.

The July primary added another layer to that history. Axios said progressive candidates made gains across Colorado, but Douglas County looked a little less hostile to Democrats than the state as a whole, with establishment Democrats generally running stronger there than the party’s most progressive candidates did elsewhere. Hickenlooper’s comparatively better showing in the county reinforced the idea that message and candidate profile still matter in a place where voters do not always move in lockstep.

Turnout data also matters in reading the result. The Colorado Secretary of State reported 48,445 ballots returned in Douglas County in its June 26 primary update, placing the county among the larger return totals in the state at that point. Douglas County’s elections records show recent benchmark contests including the 2024 general election, the 2024 primary and special congressional vacancy election, and the 2024 presidential primary, the kinds of races campaign strategists will use to judge whether this year’s primary reflects a real shift, a candidate-specific exception, or simply another modest adjustment in a county that still votes red more often than not.