Larimer County, Colorado

Larimer County Commissioner District 1

2 candidates are tracked for Larimer County Commissioner District 1 on the November 3, 2026 ballot: Shane Atkinson and Marc Roberson. Candidate information follows official Larimer County election filings; verify with the official election office linked below.

About this race

Open seat: incumbent John Kefalas (District I chair pro tem) did not seek re-election, per the Larimer County Board of County Commissioners roster. Shane Atkinson won the June 30, 2026 Democratic primary unopposed with 49,229 votes; Marc Roberson won the Republican primary unopposed with 28,127 votes, per the county's certified primary Election Summary Report (July 1, 2026, 4:37 PM posting). Both advance to the November 3, 2026 general election.

What this office does

County commissioner. The county board is the county's legislative and, in most states, executive body. Commissioners adopt the county budget and property tax rate, oversee roads, the jail, public health, planning and zoning in unincorporated areas, and appoint or confirm department heads. In counties with an elected county executive or judge, the board's role is mainly the budget and ordinances.

Colorado › Larimer County › Larimer County Commissioner District 1

Shane Atkinson

Democratic

Top priorities

Regional housing affordability partnerships
Funding for the Health Insurance Affordability Enterprise
Natural disaster mitigation funding

Per the campaign site.

Biography

Shane Atkinson serves as the Legislative Coordinator for Larimer County and is a candidate for Larimer County Commissioner, District 1, per his campaign site. He previously worked in the district office of U.S. Representative Joe Neguse and spent 13 years as a high school social studies teacher, per the site. He holds a master's degree from the Maxwell School of Citizenship and Public Affairs at Syracuse University.

Campaign site (opens in a new tab)

Marc Roberson

Republican

Biography

Roberson's campaign has focused on fiscal responsibility and lower property taxes, per Estes Valley Voice. No campaign website was found as of September 8, 2026.

Next on your ballotLarimer County Clerk and Recorder

See your full ballot

Voting info and more

Questions about this race

Who is running for Larimer County Commissioner District 1 in 2026?

When is the Larimer County Commissioner District 1 election in Colorado?

Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for Colorado are on the Colorado election hub at theballotbrief.com.

How do I see my exact Larimer County ballot?

Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.

Verify this race

Candidate roster from official Larimer County and state election office filings, last verified September 27, 2026. Bios and priorities carry their attribution inline.

Cross-check with the official Colorado election office, or see the full Larimer County sample ballot and your exact ballot by address.

The rest of your Larimer County ballot

15 tracked races in Larimer County, Colorado. Landed here from another county's search? Look up your own ballot below.

Also on your ballot

Larimer County Treasurer Larimer County Assessor Larimer County Sheriff See all 15 Larimer County races

Candidate profiles

Shane Atkinson, full profile Marc Roberson, full profile Official Colorado election office