Colorado › Adams County › Adams County Commissioner District 4
2 candidates are tracked for Adams County Commissioner District 4 on the November 3, 2026 ballot: Karen DeAguero and Joseph P. Domenico. Candidate information follows official Adams County election filings; verify with the official election office linked below.
District 4 is an open seat: sitting Commissioner Steve O'Dorisio, per the county's official commissioners page, did not appear as a candidate in either party's June 30, 2026 primary, per the certified canvass. Democrat Karen DeAguero won a contested primary over Tyler Quick, 29,805 votes (50.59%) to 29,111 (49.41%). Republican Joseph P. Domenico was unopposed in his primary (25,758 votes, 100%). Both advance to the November 3, 2026 general election.
DeAguero is an engineer and non-profit founder, per the Adams County Democratic Party. She won the June 30, 2026 Democratic primary in District 4 commissioner, per the certified canvass. Her campaign site says she brings technical expertise and a data-driven approach to county government, per her campaign site.
2026 priorities (per the campaign site)
- Environment and conservation stewardship
- Attainable housing
- Economic opportunity and support for local business
Source: candidate campaign site.
Campaign site →
Domenico was previously the 2022 Republican nominee for this same seat and ran unopposed in the 2026 Republican primary, per Denver Gazette. No campaign website or questionnaire response was found as of September 8, 2026.
